Holy cow, sorry to hear that happened and am certainly glad the injuries aren't too severe.

I have always started my plane on the ground with a fork holding the tail. I then pick my plane up with two hands to cary it to the flight line and have had several times when I've bumped the throttle to full & it's really no big deal other than it's noisy as heck & you have everyone looking at you funny as your trying to get the throttle back off.

I also had a prop go into my arm once when I was tuning an engine at home, but fortunately it was a glancing blow & just put a huge welt on it. Big lesson learned for me, so you'll certainly be more cautious in the future. I know I am.