As already said, two horses cantering towards you, well they should have stopped when the saw you. Even St Zi would have been hard to control if he'd had two cantering people coming towards him. I do think as well yeah, the time of year because a lot of horses aren't getting their normal workload - sometimes down to the miserable weather / dark nights etc. And a cold sunny day can make them sharp too of course. How horrid for you - as ever good advice about getting back on as soon as you can. Try not to leave it too long if you aren't too achy.