Continuity mistake: The tape recording of the killings Stretch has is in her right hand. A shot later, it's suddenly in her left hand with her purse in her right hand. (00:16:18)
Revealing mistake: A sign's wooden support gets shot at the beginning, but you can see where the pre-prepared weak point is in the support before it gets "shot."
Continuity mistake: When "Lefty" is at the car crash site, you see a blue mobile home going down the road, but it is not there in the next shot. (You may not be able to see this in the full screen version (4:3)).
Other mistake: Leatherface attacks the Mercedes. The pick up is driving backwards, the Mercedes forwards. The Mercedes should easily be able to outpace the pickup.
Continuity mistake: At the radio station, Leatherface cuts into the tube with the beer cans on ice. In slow motion, the chain comes off the chainsaw. After the cut, the chain is back on.
Revealing mistake: Leatherface attacks the Mercedes. The pick up is driving backwards without the reversing lights coming on. Most likely a reversed shot.
Answer: No, the hitchhiker was killed in the first movie when he's hit by a truck. His corpse is the body that Leatherface uses as a puppet during the opening scene. (He's nicknamed "Nubbins.") Chop-Top is supposed to be one of Leatherface's other brothers. According to director Tobe Hooper, Chop-Top was away in Vietnam during the events of the first movie.
TedStixon