Maybe this needs to be said... maybe not. Maybe you are already smart enough... but I wasn't and managed to dodge a MAJOR bullet.
Took my brand new can of race gas into the trailer to be tested before racing. It was late enough in the day that the can had warmed up. I pulled up the little plastic spout, unscrewed the top, and then, without a thought, tore off the spout seal. And that brand new (now hot) race gas literally exploded out of the can, blowing all over the inside of the trailer, me and JD. Only by the grace of God were we not hospital casualties/burn victims. As it was we were soaked in gas and experienced all the "fun" that that can be. Thank the Lord nobody was smoking!
Soooo... the first time you open your new can, do it cold, like in the morning, outside away from any structures, and put a rag or something over the seal when you pop it.
Oh, and near a fire extinguisher might not be a bad idea too.
Keep the rubber side down,
Jim