Some dumb things Ive done:

Asked an older woman with a bloated belly if she was pregnant (I was feeling very stressed at the time because of exams)

Put diesel in my petrol car after I'd owned it for 4 years!

Invited the bloke I fancied to my flat where I lived with my female partner.

Years ago my BF showed me a model car he had just painted and I dropped it on the carpet so it got covered with fluff etc

Visited a friends new flat and spilt my drink on her nice new table cloth.

I left the gas ring on, came in with a box and put it on the cooker where it caught light and filled the kitchen with smoke.

When I was little I pooed in the bath, (only a little poo) even worse I was sharing the bath with my sister who was disgusted.