What is something you did once and will never do again?

Use credit cards like it's free money.

Signed, million man.

THE samoanjoke.

Go to Greece.

Missed the bus

https://www.youtube.com/watch?v=_Tr8KRqyGJk

Getting to know average people that live in second-world countries(Poland, Hungary etc.)
Even though it's not the third world it's just ridiculously hard by my standards. So I end up thinking/worrying about them all the time.

ice fishing

Ride a horse.

It may look easy but once seated, your perch is much more precarious that it looks. It's like trying to balance yourself on a unicycle, and just falling off of it while it's standing still could hurt you really bad. Doing so while it is running or even trotting can turn you into a cripple for life, assuming your head doesn't get bashed open.

I was socially pressured into riding one by a relative who owned several horses and they wanted me to ride one with them. Was very uneasy the entire time.

When I was little I stuck a bobby pin into an electrical socket. I never did it again!