Things that seem like good ideas at the time

There are times when supreme confidence and ego take over one's psyche.

depending on how much one has had to drink there are time when our boozer could be forgiven for thinking he can do anything, face anything at anytime. But then that's just the booze talking. In Henry Fielding's classic novel, later made into a movie,  Tom Jones, the author Fielding makes the observation

that in his view, drink does not alter the nature of a man, it just reveals it more clearly.
Regardless , there are things that should never be attempted no matter how confident and assured you are.