I thought this seemed weak for a one-use item, especially compared to the tommy gun (since the character gets to choose between them), but then I noticed it doesn't actually say it's one-use. So is it in fact reusable? Or is this just another error. I suppose it's not that weird, if you just assume you've got a satchel full of the stuff and only use one stick at a time.

It is a one-use item.

"Action: Discard this card and..."
Discarding it is pretty much the equivalent of a one-use item

I read the card again and I guess it might be useful in certain stories, when the keeper has to gather monsters somewhere or try to fill a bottle neck with monsters so the investigators can't escape. Or, really, if you need to remove a monster ASAP, dynamite has a potential to deal 10 damage in a single action. Pretty awesome with enough luck.

But what really shines are Michael's stats if you dynamite. +2 Strength, +2 Dexterity makes him much more flexible, if you ask me. Of course, he then misses a regular weapon... decisions, decisions

(Sorry for the double posting, I realized one cannot edit posts after a certain time span )