Mine happened about 25 years ago. My room-mate (and co-worker) and I decided to eat out at a restaurant before heading to a prayer meeting that evening after work. Being in the music ministry, I had my guitar with me, and set it down beside the booth in the restaurant. After we were finished, we both got up to leave and I tripped over my guitar case and landed flat on my face on the floor. The restaurant was packed. Thankfully I had a great sense of humour back then and we were both able to just walk proudly out of the restaurant - and then we doubled over with laughter out on the sidewalk.