Have you seen... [liquid nitrogen and pools]

I don't know who has a stash of liquid nitrogen just lying around their house, but these two must have a source.  First, a cool billow of fog is created when liquid Ni is dumped into (on top of?) a pool.

Second, this group filled a contained with liquid Ni.  It starts evaporating right away but the change accelerates into a controlled explosion (underwater).  Probably not the one to try at home, IMO.

Makes these guys that just use dry ice (solid CO2) seem pretty lame, huh?