ROFL, Dreamcatcher...I looked at this pic and all I could think of was of that SmartPak ad about how one-size-doesn't-fit-all and it's got a massive horse wearing a mini saddle...
One day, I think he was about 10-ish, my trainer hopped on him and said, "HOLEY MOLEY he doesn't have withers, he's got shoulders like a friggin' bull!". That was Lucky. We used to laugh if I forgot to tighten the girth after I rode for about 30 mins, because he'd go around a corner sharp and whoooops! The saddle would slip around to his side and I'd get dumped. It was CRUCIAL to tighten that girth.