When I was out on a trail with a couple of friends we were cantering in an open paddock. One of my friends was cantering in front and I was cantering next to my other friend. My friend next to me was riding one of my horses Banjo. Banjo kicked up a stick that was on the ground while we were cantering and it hit his back leg. Then he was cantering on 3 legs!!!!!!! he lifted up the one that got hit but kept going!!! He put it back down after about 6 or 7 more strides. It was like he hit his leg, lifted it up and said "ow ow ow ow ow" then got over it, put it back down and kept going! It was so weird!!!! I thought horses couldnt even walk on 3 legs let alone canter on 3 with someone on his back!!!! We all just laughed, it was funny!!