I don't have any that are as amusing as some of yours lol, but I have a few.
The photographer spooked my boy, so he took off wayyy early. You can't really tell from the angle that the pic was taken, but if I remember correctly (this was like 5 years ago) he was more than a stride early...hence my leg lol.
His legs in this one make me giggle. Whenever he decided a jump was too low for him to dignify with a proper jump, he'd do something silly like this.
This is the stallion that used to live at our barn while my trainer was teaching him to be a better jumper...as you can see, this was at the early stages of his training haha (he actually went on to be a lovely show jumper). I had to KICK him over that fence!