“Students who have taken my knife fighting class will likely remember ‘The Bag Trick,'” Greg Ellifritz writes at activeresponsetraining.net. “I demonstrate it in every 2-day class I teach. My students all give me the same feedback after seeing it ‘That’s so simple, but it’s genius! Learning that one technique was worth the price of the whole class!'” So if they already learned it here, should they save their money? Anyway, make the jump to find out what’s in the bag (as if you didn’t know). Meanwhile, I gotta say: if I saw Greg coming up to me with a bag held like that I would wonder if he’d use it as a cudgel. Which he might do, now. Just sayin’ . . .