Tannerite makes a BIG BOOM, and you need to keep your distance when making it go boom.
IIRC some guys demolished a an old barn using 160 of Tannerite (you can see it by watching the whole video link).
Some products have warning labels for a reason, he was 40 feet away instead of 100 feet away.
Semi Sorry he lost his leg, but he gets no sympathy from me.