Oh my gosh haha Buck does the same. And then there is Bob, my all around (obese) horse. He will buck when he doesn't want to lope out of pure laziness.
Haha I can see that is your brat child of the group. My palomino mare is the bratty one in my bunch. She thinks everything revolves around her and she has a fit when she doesn't get what she wants sometimes.
He likes opening gates and escaping, throwing brushes and blankets, and playing fetch *special ed pony* and HATES being left in the pasture while the others getting played with.