Visible crew/equipment: In the finale, Jessica runs over to Jason from behind and she stabs him in the heart with the dagger. Then, Jason lashes back and hits Jessica, and she goes flying backwards. Absolutely anyone can see the large blue crash mat that she lands on (cropped/edited out in some versions). (01:20:25)
Visible crew/equipment: When Steven carries Jessica to the car, they climb in. Then, as the shot is being filmed very close to the car, a crewmember wearing a white tee-shirt is perfectly reflected in the car window. (01:00:40)
Visible crew/equipment: When Pookie shoots at Robert, who is possessed as Jason, in one side shot you can see Pookie is wearing safety goggles. In all the other shots he has nothing around his eyes. (01:09:00)
Visible crew/equipment: When Jason runs onto the large shooting field, swat members start shooting him. In one shot behind Jason, you can see a black hose running across the grass, and going up into the trouser of his right leg. (00:06:25)
Visible crew/equipment: When Jessica enters the living room, and Vicki is cleaning the bloodstain, you can see a boom mike pole in the top right corner by the ceiling fan. (00:41:35)
Answer: There isn't much of a feasible in-movie explanation. In truth, the entire scene was added by the director because he felt the movies were pretty sexist in that it was mostly women who were either nude or sexualized. Thus, he added an inherently homo-erotic sequence involving one man shaving another stripped man to "level the playing field" so-to-speak. The only real explanation I could think of is that maybe the creature just thought it'd feel uncomfortable transferring to a man with a mustache. But even that's shaky at best.
TedStixon