False statement about the blowjob
During the house party, when Bobby wants a blowjob from Cindy, she claims "I've never done this before" (to which Bobby suggests to think of it as a tootsie pop).
However, a year before, when they were in a car before hitting that man, Cindy was blowing Bobby, caused by Greg hitting her with a foot while having a bee nest on his head. In fact, Bobby enjoying this act of hers was the very reason why he wasn't paying attention to the road.
Therefore, Cindy's statement is false.