I maintain a private database which documents each time I've been trapped in a lift (or nearly trapped), for the duration of each occurrence (in minutes:seconds), which floor I was trapped on/between, make/model/fixture line of lift, location & date. In my database I currently have 41 incidents logged, since 2005 when I got trapped in my first one, which was in October 2005. 5 of the 41 were actual entrapments.