I'm not saying I'm about to run outside and test it now or anything. But my body can withstand a large number of things due to my powers, and I'm finding more and more that the things I can do for myself, I can also do for others.

Given the kind of missions the X-Men go on, which exposes them to all sorts of extreme climates, I think you can admit that it would be useful for me to know how to do that, just in case a situation arises where it may be necessary.