I say the guy that told you about the bomb and "killing guys like you" needed a serious as kicking right there on the spot. You seem to be able to handle yourself and you took him down, I'd have let him have it, and I'm probably half your size. Plus, any fuckin idiot that tells me he planted a bomb is DEFINITELY going to be talking to the cops. then again, you're in canada and it's more likely he was just full of shit. Here in the states, when someone makes a threat like that, you take it seriously.
Yeah I was bigger than him, but the guy had a large frame so I wasn't that much bigger. It wasn't about size though, I just wasn't gonna stick around and try to wrestle a weapon out of his hand. So I just disabled him enough to get away. I did think about kicking him good in the stomach, but there was no point, as I had already caught him totally off guard. I just used the opportunity to get away.
As for telling the Cops, I thought about it, but it was pointless, and I didn't want to get involved with them. Nothing happened anyway as I could tell the guy was just drunk.