I can't recall the expedition or details, but on one artic adventure documentary I watched a while back one of the participants took 'too long' for a number 2 (

I can't recall the expedition or details, but on one artic adventure documentary I watched a while back one of the participants took 'too long' for a number 2 (> 30s), and his 'free hand' (sans gloves) become frostbitten so badly that he had to quit. He was kicking himself over a 'noob' mistake.