Skip to the firing part jump to: 4:49.It's worth a trip to Warwick Castle anyway if you are going to England since it's one of the best preserved in England that you can tour.It has the trebuchet, a dungeon, and towers you can walk to the top of. Definitely worth it, and watching in 1020HD on a large screen kinda puts the size of this thing in perspective. (Source Credit: YouTube Channel: https://www.youtube.com/watch?v=kSMLwgTVvLI original video: https://www.youtube.com/watch?v=kSMLwgTVvLI