KC is attacked by to goons that over power her. You can clearly see the goon in the black shirt handcuff one of KC's hands before dragging her over to a set of pipes on the wall. When they get her to the wall all of the sudden KC is no longer cuffed and the goon in the black shirt has the cuffs in his hands. The goons then secure KC to the pipes out of sight of the camera and the goon with the black shirt stuffs a gag in her mouth. When the goon in black steps back you can see the cuffs are no in the other goons hands and you cannot see anything holding KC to the pipes.
KC's mom comes to her rescue and looks like she is trying to uncuff KC although you cannot see this from the cameras position. With KC being freed her and her mom move to fight the goons however there is no handcuffs anywhere to be seen.
During the credits you can see that judy has two real arms but in the next scene you can see one has been clearly replaced with a fake.
at the end when there is a knock on the door ernie has his hands up but in the next scene he has them on his computer.
When kc drags ernie over to the kitchen chairs you can see him moving his feet like he is walking showing he is not really knocked out.