Customer - Why does the back of the frame look like that?
Shop Guy - This bike has elevated chainstays. It allows them to tuck the rear wheel up underneath you, real tight.
Customer - What's that do for you?
Shop Guy - It makes the bike more responsive; real good for doing wheelies.
Customer - Oh really? Show me.
Shop Guy - Umm, uhh, naahhh, I'm not a wheelie guy. I'm more of a jumper.
True story. (Names withheld to protect the not so innocent.)