Boundaries between being professional and informal in an interview

Thing is, you told your interviewer a story, i.e. something that happened to you. He asked for a fun fact about you, i.e. a fun personal characteristic of yours. You were literally off-topic

Anonymous Monkey

I was asked one question like a funny that happened to me and I couldn't think about anything so, to stop the akwards silence, I just said the first thing I could think of which happened recently (funny but not professional).

I was basically picked up from x location, something like bus/train station, airport... by my friend and taken home.

The thing is, my friend was a delivery driver for a famous supermarket (and yes I did some drops before being left at my house). The experience was pretty good and surreal (you had to see the people around us seeing me put my bags in the groceries van), had great fun, but I believe this was not an ideal experience to share as I am unsure what image it will give about me.

Personally if someone told me a similar story I would die laughing (the interviewer didn't, but he found it funny) but I'm just an immature graduate, so I was wondering what actual experienced professionals would think about this.

If this was not the way to go, what kind of experiences do you think are more appropiate to share?

The best part is that my friend and I were both students (and idk how he didn't get fired). He managed to maintain a good GPA while working >20h a week and had a good social life (one of those ones).

Huh?