This occurred to me yesterday when I was swimming in my apartment's (yes I live in an apartment now) ridiculously shallow pool-
I crack my skull on the bottom of the pool mid-flip turn, black out, and drown. No one notices that I'm dead for a few days because the people that I live with are so glad that I'm not around. After they find my corpse, they take it out downtown for five rounds of hard drinks. Not that weird I guess, but it could happen.