Running is GOOD exercise...

or you could do like david blaine
"how'd you do that?!?!?!?!"
stare em in the eye and shake ur head slowly and mysteriously, and then pretend like u just remembered something and say "Oh, and the weirdest thing.." and go on to next trick

i can throw cards really high into the air like 50-70 feet average ne way i just say when someone says how did i do that. i say grimlins sit on the roof with fishing poll and reel in my cardlol

Q: How did you do that?

A: I Have no idea?

next question is usually:

Q: Can you do it again?

A: I don't even know how I did it the first time!

man, all those are good, ill have to do those some time. thanx!

By the way- there is a book for magicians that expressely details what to say in what type of situation- I believe it's called "Foot in Mouth", although I could be wrong. I also don't know who the author is, so any help might be appreciated. I do, however, have a couple of pages that were photocopied from the library at the Magic Castle, so I'll look for the author there.

Make up a long math problem like- "What is 342*66647*348576*0.0*4358973*5.666*0.1115?" It will really make them think. Just make sure you have a zero in there. And then you can move onto the next trick.

--by the way the answer is zero--

does that really get them off your back?

What I love is when they give you options, like did you palm that or was that in your pocket all along. Then you just smile knowingly and say "Yes". Remember, the smile is key. Then continue with your routine.

I was looking on here earlier and there was 1 that said "I stopped time, did the move and moved on...somthin like. For those of you , and me, who have the pro pk should at that moment stop a watch. Nice effect!