Anyone know how to do Dave Mustaines spider chord technique?

Hells yeah! What do you needa know? It's pretty self explanatory if you know what's going on. If you need practice, learn Wake Up Dead. The part at 1:26 to 1:42 is a crazy-ass spider chord riff I like to practice. It's a tough one, but you get it after ten minutes or so. Use fingers 1 and 3 for the A string, and hammer down with 2 and 4 on the E. Hope this helps.