Once, we were moving into new houses for work and it was our first day. First of all I couldn't open the gate so I asked another girl if she could and then I realized it was a sliding gate not a pull.
After I'd got inside and had a look around and stuff I thought I'd go and explore the area, got outside and realized I'd left my key inside and didn't realize the door locks automatically once you close it so I was locked out.
I called one of my friends though cus he was staying with me and only took about 15mins to get back so it wasn't too bad.