When we first see the naked Oscar hanging from the gable on the roof of the house, he's about three feet from the window. Subsequently, in close-up he's much closer than that, and we can see Jeff reach right out and grab him, as he is much closer to the window now than before.
Jeff says he's a pharmacology student. His father Duncan asks him how things are going at Pepperdine. Per their own website, Pepperdine has no pharmacology program. He is using term "pharmacology student" as a euphemism for "drug dealer."