glute knots...

My left glute is in absolute agony at the moment.... there I was trying to work out what on earth I could possibly have done to it...when... *PING* ..golden lightbulb moment.... aaaah, that's right, I was trying to brace against my 600kg maniac of a horse on Saturday as he suddenly realised he was no longer foot sore from his abcess and felt FANTASTIC.... Luckily I was sensible enough to be lungeing him on the long rein prior to trying to get on the lunatic. Otherwise I feel I may be in traction rather than just suffering a few knots in the bum.