[quote=@Leolycan]
Guess I was expecting a more radial explosion then a directed one... Oh well. Live and learn.
[/quote]
The main problem was that you specifically said that Vex pierced the canister, in which case there'd only be a small hole for the gas to escape from, hence the rocketing effect. If he'd stood back and kiked the canister into Yjrash's face from across the rofftop you'd proiably have ended up with an entirely different outcome.

And before you ask, yes there are several other fire extinguishers inside the building, along with other emerbency supplies.