If you want to do something that requires bravery and is unpleasant, I'd like to suggest giving blood instead? You have to get stabbed at least twice (once to t

If you want to do something that requires bravery and is unpleasant, I'd like to suggest giving blood instead? You have to get stabbed at least twice (once to test your red blood count, the other to actually stick the needle in) and then sit still with a needle in you until a bag of your blood fills. It's overall pretty unpleasant. But also, you save lives, unlike jumping into a cold pool.