yea the can was def on fire ... wd 40 is not that volative without some sort of flame. i would know, its one of my favorite things to play with and a lighter.
and most def not a sledgehammer , a stick or a hoe like canada said.
i've smashed cans of wd-40 before and it did nothing but spray lubricant everywhere. this video didnt even elicity a chuckle out of me