locked in a restaurant bathroom

I don't know if this has ever happened to anyone, but it was the first time for me. I went to a party of good friends last Saturday in a restaurant. I went to the bathroom and when I closed the door, I noticed that the latch to lock the door was a little strange. I tried to close it but I guess I didn't do a good enough job because someone tried to come in while I was still inside. I quickly yelled to prevent them from opening the door all the way and then I tried to lock the door better. When I was ready to leave, I found that I couldn't budge the lock and I had to yell for help to get someone to open the door. I yelled for a while and finally someone who was in the next cubicle went to get help. It took several people looking for a screwdriver about 15 minutes to get the door open. When the door finally opened there were about 5 men from the restaurant staff standing around looking at my grand exit!! I thanked them and they were quite apologetic that it took so long. When I got back to the party , my friends had wondered where I was for so long so I told them this story.