You're an idiot. Even assuming you held your breath for three minutes, you'd have to consider the time it takes to actually escape the cave, so it's three minutes minus however much time it takes to haul your ass out. And by then, the poison will be a lot thicker, so you have to take into account that you'd have to run without breathing, which I'd like to see you try.

[Leave it to the resident poisonfucker to ruin everything.]