Ouch! Glad you are ok, it could have been a lot worse.
I witnessed exactly that type of crash a few years ago riding the levee roads around here. A couple on a harley about 100 years ahead of me went around a left curve just a wee bit too wide, caught the front tire in the dirt and high sided down the levee. I thought for sure they would be seriously injured or worse and this was pretty much out in the middle of nowhere. Fortunately they were just bruised and dazed.
It was so fast, first they were upright, then they were gone. The difference between upright and down is not much in motorcycling.