[nj_bartel]

Is there a certain volume of liquid to surface area of heating surface that must be present for the Leidenfrost effect to take place?  I ask, because I know I can dip my hand into liquid nitrogen briefly without problem, but if it boils and pops onto my skin, I get burned.  Same thing at the dermatologist - they squirt liquid nitrogen onto warts to kill the skin.  I assume it's an extremely narrow stream, the basic idea being that the liquid nitrogen instantly boils and carries heat away before the gaseous nitrogen is able to form a protective pocket?

[gregdwulet]

I didn't really feel like reading through all of this, but if you do, you might find something;
http://web.mac.com/garyawilliams/Site/Leidenfrost_files/david_erickson.pdf

[nj_bartel]

Thanks, great link