1: So, uh...what do you wanna do?

2: I dunno, what do *you* wanna do?

1: I dunno, uh... what do *you* wanna do?

Every time. 

First time I heard of that bit was when I watched Disney's Jungle Book when I was 5. Ever since then, I have to answer a "What do you wanna do?" with an "I dunno, what do *you* wanna do?"