Being a mathematician and statistician, I guess I qualify as a "Math Nerd" (though no heckler LOL). In fact I use card games, gambling, and yes, TRICKS, to illustrate to my statistics classes the concepts of probability and expectation.
Don't discount the math-based tricks entirely. Some of them are based on fairly complicated combinatorics principles, and are not always obvious to figure out on the spot.
For example, a classic trick that has been written up in journals on probability goes like this: A spectator freely choosed 5 cards at random. They are given to the magician's assistant, who knows how the system works. The magician leaves the room, and the spec takes one of the 5 cards. When the magician returns, he looks at the remaining 4 and instantly knows what card the spec took. (See, the arrangement of the 4 remaining cards codes for the denomination, and the pigeonhole principle lets you know the suit, and..... [large amount of math stuff deleted cuz this isn't stats class LOL] )
This would be excellent to use on a heckler because they won't be able to figure it out unless they know the underlying math.
Ooooh I love that word...let's say it again.....MATH