Continuity mistake: When Bucky jumps on the hood of the bus to get back in, the Creeper flies from in front of the moon towards the bus causing all the kids to run away. Bucky can still be seen staying put on the hood when they run - however in the next shot of all the kids running you see him at the front of the pack which would have not been possible given that he didn't run right away.
Continuity mistake: When the coach has been taken away by the Creeper, Scott moves forward passing two guys saying "Where the hell is the coach?" When it cuts he is behind the two guys. (00:26:05)
Continuity mistake: At the end, when Taggart gets off the truck after he fired into the Creeper's head, the spear he is holding changes from pointing up to pointing down. (01:29:50)
Continuity mistake: When Scotty asks Minxie if the Creeper will keep on coming for the ones he has picked (right before he tries to throw the marked kids out) she starts to turn away to the left, but in the next shot she is turning to the right. (01:02:15)
Continuity mistake: Just after the man says 'he looks dead to me' (he means the Creeper) he walks past the girl who holds the black guy sitting/laying on the ground. The black guy is buried deep in her arms and he holds his right arm half over his face and on her left elbow. His fellow 'pupils' walk to him. Next shot: his fellow pupils walk to him, but now his right arm is lower, exposing his face and his right hand is now at his chin instead of on her left elbow.
Continuity mistake: When Izzy finds the javelins on the bus, Bucky is the only person at the front of the bus (because he is trying to call on the radio). In the next shot Scotty appears out of nowhere at the front of the bus and yells, "Sticks. You want to hang around here so that you can poke at this thing with STICKS?" with Bucky standing right next to him.
Continuity mistake: When the Creeper has grabbed on to Bucky's head through the bus roof, we see Bucky holding on to both poles in the bus, then he moves his hand over holding one pole with both hands. When it cuts from behind him he is holding on to both poles. (00:47:00)
Continuity mistake: When Billy leaves the second scarecrow to check out the Creeper, the bends in the wire on the scarecrow change. (00:04:05)
Continuity mistake: After the Creeper has fallen on the bus roof one of the kids goes to look up the hole on the roof. First, as he is climbing up he is placing his right arm up by the hole. When it cuts his right hand is down holding the steering wheel. (00:51:10)
Continuity mistake: When Jack Sr. and Jack Jr. run towards the tractor, after hearing Billy scream, Jack is holding onto the rifle with both hands. When it cuts he places his left hand on the rifle again. (00:05:50)
Continuity mistake: When the assistant coach is grabbed everyone runs to help him. In the shots from outside we can see Izzy right inside the doorway holding onto the bar, but in the shots from behind he's disappeared and there's no one holding the bar. (00:30:40)
Continuity mistake: As the assistant coach is grabbed from the bus doorway, the same reaction shot (Izzy standing up as Chelsea and Rhonda fall backwards) is played twice from different angles. (00:30:15)
Continuity mistake: When Dante finds the flare gun it's obvious that a lot of material has been cut on either side (as you can see in the DVD extras), since the flares are at the front of the bus and he isn't visible up there in any other shot during the whole exchange. (00:33:55)
Continuity mistake: The Creeper removes Dante's top clothes after decapitating him, but in several shots of the bus overviews from the outside, the clothes are not seen anywhere.
Continuity mistake: When the bus driver lights the flare she holds it in her left hand. When the Creepers grabs her it's in her right hand. (00:27:40)
Continuity mistake: When Betty and Coach Hanna are going through the "lock-box", she pulls out the flare gun and the Coach's arms go from being pulled in to his chest in one shot and reached out for the gun in the next.
Continuity mistake: When the Creeper rips his head off to replace it, he throws it in front of the bus, hitting the windscreen and leaving a mark. Later on, there is no mark and no head in front of the bus. (00:59:10 - 01:17:05)
Continuity mistake: When the creature flies over Kimball and he looks up for it, Kimball changes from facing his left before the shot change to facing right in the closeup. (00:18:10)
Continuity mistake: When Izzy, Rhonda and Double D are running away in the car, there is a shot inside the car where Izzy tells Rhonda to get out, but there is not sight of Double D in the back window. When it cuts, D is leaning against the window. (01:20:30)
Continuity mistake: When the birds suddenly fly away, it startles Big K and he falls over and yells. In the next shot, all the people look up to see what happened. It then shows Big K fall over again in the next shot. (00:18:25)
Answer: Eating human flesh helps the Creeper regenerate his whole body, no matter which part he ate.
Celldweller55