Gotcha!

Teen-agers on stunt bikes outside the library, noting my rear view mirror.
"I should have one of those."
Me: It's a great idea.
Teen: Yeah, that way I could see the cops. (Proudly) I got pulled over for speeding. I was going 35 and so was the cop.
Me: That's pretty fast, especially when the speed limit is 25.
Teen: How fast can YOU go? (Nyah-nyah tone of voice).
Me: I guess my average is about 10-13 MPH
Teen (giving me "The Pathetic Old Person" look.) THAT'S not very fast.
Me: No, not in comparison to 35, it's not.
Teens give me The Smirk.
Me: Of course, I just did that average on a 25 mile ride Tuesday....
Teens: (gulping in disbelief) Uh, really?
Me: Yep, and my husband's average is about 16 MPH on a 50-100 mile ride.
Pause.
Me: Kid, if you can do 35 on big hills for 100 hundred miles, you should be in the Tour De France.
Pause.
Teens are deadly quiet.
Gotcha, you little bastards!