Barrels can make sense (a room full of black powder for story reasons, casks full of wine) but they should also explode properly, like a barrel of wine shouldn't explode like a barrel of gunpowder.
This gave me a flashback. I was trying to knock out a merchant instead of killing them so I could continue to trade with them (this was before I realized knocking out doesn't actually prevent future auto-hostility). I knocked them out successfully but they were still on fire, and I didn't have a water balloon/spell. I did have a pint of beer though, and I thought "hey, beer is mostly water. I'll throw this near them to put out the fire :)".......it did not work out as planned.
I get that beer is technically alcohol and alcohol is technically flammable, but pls.