Good thing I had heavy leather gloves on!
I absolutely hate an angle grinder for this exact reason! I've had many many close calls and a couple small injuries that's could have been alot worse than they were with them. I had a close call just a month or so ago I had a cut off wheel buck and caught my sweatshirt. Luckily it didn't hit skin but it damn near beat me to death before I could unplug it.