[ridewhencan]

Well, from The Top 10 Nitrous Mistakes, comes:
1. Never heat a nitrous bottle with anything but an approved bottle heater with the proper safety features. If a nitrous bottle is overheated or heated too quickly, a catastrophic explosion can occur."

It's the "heated too quickly" that I didn't know about. Since I am about safety (two kids seats in the back, yo.) though I'm tempted, I'll pass. (Yes, that was a pun - look out grandma in the slow lane, here ah come.)