I love when someone asks me to do something random or hands me something and asks that i do magic with it and i instantly think of something that i can do. Its so strong because you aren't asking if they want to see a trick (which, in their minds, you have ready and set up to go, which is possibly the case). But rather you are fulfilling a random request of theirs with magic. Then its real. I think David Acer coined the term "random acts of magic". Im not quite talking about a radom act of magic but this is close. And it gets similar reactions.
So I'm at work today - i work at a little ceasar's pizza in my town - and it was relatively slow. A bunch of the guys that work there and i were standing around the front by a trash can talking about random stuff. And one guy says, "Connor you should do some magic tricks". I put my hands in my pockets and say, "with what" (I have a half dollar in my left pocket and a jumbo half dollar in my back left pocket. They have no idea what's about to hit them. Muahahahahaha

. Now i could talk about the importants of preparedness here but that's a whole other post. For now just go by the boy scout motto of "always be prepared")
Another guy pulls out an empty box of "Dots" - those little gum drop like things - out of the garbage can and says, "can you do a trick with this? I remove my hands from my pockets and grab the box with my right hand and look inside it and say, "why is that in there?" at which point i proceed to do a shuttle pass/flying shuttle like move with the box and coin apparently dumping the coin out of the box. To which i receive gasps and laughter. Some really really great reactions. I flip the coin to derek, one of the guys there, and say "check it out". As he does that i casually hook my thumbs into my back pockets and a james dean-esque posture to show how cool i am and get ready to steal the jumbo. I steal the jumbo coin, take back the half dollar and say, "its weird that this was in there. It doesn't seem like it would fit" as i stretch the coin to three times its original size. To which i receive even greater reactions and derek quotes the
40 year old virgin "so you carry a rubber ear and a giant coin with you everywhere?". We all laugh and i pocket the coins. And they start with the "how did you do that". I give my usual "very well don't you think?" and walked off to wash dishes.
Hopefully can see how this kind of performance is stronger than a planned or solicited (solicited by you) performance and why it is so. Its for this same reason why self tying shoe laces, for example, is so strong. Somebody makes a request and you fulfill it with magic. There is no way you could have known they were going to make that request. And its that which makes it so strong.