My younger sister took her 4 y/o gelding for his 3rd time at a local schooling show, her 2nd time showing as his rider. He is 17.3H and my sister weighs all of 105# .... Naughty in the warm up and gave her a couple good aerial bucks so she held him back a bit in the test...the warm up ring was pretty funky, no rails, ponies, little kids running around, horses all going different ways got him amped up.
He had a little stumble in his test, but a great recovery and got right back into his circle and in the groove...I would have fallen off! I wish I could sit a horse like her!
You can fast forward and watch from 30 seconds in: