AHHHHHH! Throw the heat rock away!!!

They produce too much heat, the heat builds up and doesn't really dissipate and your snake can, and sometimes will just lay on it until it's cooked.

My god I found a heat rock advertised for usage with snakes, and it says it hits 101F AHH! These things need big fat warning labels saying they are dangerous to your animal, since it is.

http://en.wikipedia.org/wiki/Heat_rock

See Wikipedia has it right, these things are not safe, and are poor for heating a habitat. Use a UTH with a thermostat.