Sam Witwicky: Miles? Miles, listen to me. Listen. My car, it stole itself, okay?
Miles: What are you talking about, man?
Sam Witwicky: Satan's Camaro. In my yard! It's stalking me!
When Frenzy attacks Sam, the teenager wears straight leg jeans with a narrow leg opening (not boot cut) and thick-soled Nikes, seen in numerous shots, as he kicks at the Decepticon. After the cut to Mikaela (who finds the reciprocating saw), during which Frenzy has already pulled off the bottom of Sam's jeans, Sam continues to kick and scream just before he gets up and runs. Problem is Sam still wears both thick-soled Nikes, neither of which slipped off as Frenzy maniacally pulled the jeans, with narrow leg openings, from his kicking legs/feet. Impossible even in the best of circumstances.
When Bumblebee first appears and parks itself in the used car lot, it's parked beside a yellow Beetle. The yellow Beetle was the original form of Bumblebee in the Transformers cartoon series.