Weed whacker wouldn't stop so I hit the kill switch, now it won't star
I used a gasoline powered weed whacker today fir my first time. At one point the engine started revving like crazy by itself and letting go of the throttle didn't slow it down so I flipped the kill switch. Now I can't start the weed whacker anymore. Being new to weed whackers, I dont know what to do.
A mistake I may have made is I didnt switch off the choke switch after the engine had started. I tried switching it off once and the engine stopped, so I just left if on this time.
What might the issue be here and how would I diagnose and fix it?