Nailed It by Scott Alexander

Scott has kept this a closely guarded secret until now. You’ve seen the rest, now see the best! You know the plot, and the storyline, and the horror stories associated with this effect, but now you don’t have to worry. Scott has taken all the danger out of this effect without taking away the impact. Here are a few things to know. - Bags can be loaded in front of the audience - Spike is examined and proved real by the audience - Audience can freely choose which bag you smash - The sneaky stuff happens right