1968 GTO Resto-Mod

[1968 GTO Resto-Mod]

yesterday afternoon i ran the oil pump priming tool again for about 10 minutes, primed the fuel line, and started the engine.
writing this now, about 24 hours later, my heartbeat still hasn't completely stabilized.
when i turned the key the carb sputtered and burped for about 3 seconds before combustion took off.
i didn't even have my foot on the pedal but it ran up to about 4000 rpm in the following 3 seconds.
at that point i knew something was wrong so i turned the key off.
10 seconds into the operation the key was in the 'off' position but the engine was still running at around 4000 rpm.
i panicked.
the sound was powerful unlike anything i have ever heard in my entire life.
i switched the key back and forth a couple times with no effect, then i jumped out of the driver's seat and caught myself staring at the melting paint on the exhaust ports for about 2 seconds before disabling the ignition system.
when the engine finally stopped the shop was filled with smoke and i was on the verge of a full blown heart attack.

i do not know what happened.
i do know i have a lot to learn.

thanks for having a look at my thread.
danny