You can intepret the prompt any way you want from "that woman was so hot she made me do crazy things at Niagra falls" to "it was so hot that I sat in the oven to cool off" to whatever else your damaged minds can think of. Make me proud.
First, the rules
The rules here are pretty basic: I, or someone else, picks the topic. You write about it for 10 minutes and then must stop.
The time must be spent writing, not editing.
Editing is a no-no in this exercise. The idea is to make your inner editor shut up. Everyone who writes is asked to provide constructive criticism for all other writers.
A detailed essay on why exercises like this work and are good for you is here.
More food for thought for writers is here (about Peter Elbow and Annie Dillard) and here (listening matters!)
Links to other writing advice and writing experiments are available via the writing advice group



