If:
a) the people sitting in front of you on the bus are talking (with enthusiasm) about gambling, and
b) the people sitting behind you on the bus are talking (with enthusiasm) about doing drugs, and
c) you are thinking (with enthusiasm) about how soon you're going to get your hands on the new Harry Potter book,
you just might be a ginormous geek.
(With apologies to Jeff Foxworthy.)
