I would just like to second the fact that green + green = black and blue. Then red, then purple, then green, then yellow....
I was one of those 'not so smart' kids that decided that the first horse I would work with would be a 6 month old virtually unhandled, people agressive, biting kicking rearing bucking MINIATURE
horse, and this was the result.
This is just half of it, only 40 minutes after the incident. The other bruise from her other hoof (yes, I was double barreled) was up on my hip.
three weeks later it still looked like this.
I'm very lucky she didnt break a bone!
Now just imagine if she had been full sized?
Luckily, we both made it out fine by the skin of our teeth, but I had HUGE amounts of retraining to do with her and I got hurt more often than I want to admit...all of those times but one being my fault. She's a four year old driving pony now but it took almost a year of work with a professional trainer to undo all of the mistakes that I did before with her. I'm amazed that she wasn't ruined.
Please please please
take the advice of so many of the people here and only get what you KNOW you can handle, not what you 'think you can learn to do' or 'have done once.' It rarely ends well, as you see here.