Basically everyone who jumped from the Golden Gate Bridge and lived (only ~2% of jumpers) regretted doing it before they hit the water.

My teacher in biology back in school explained that this was due to hormones being released something something close to death something something. In essence, it was not a "choice" to regret jumping, but rather a biological response. So you would regret it wether you wanted to or not, so to say.
^Can't^ ^give^ ^you^ ^a^ ^source^ ^since^ ^I^ ^don't^ ^have^ ^one.^