What would happen if during someone's first acid boil out of 4, there was a small crack that allowed most of the water to steam away? Assuming the other 3 went nicely with a fuller lid that didn't allow vapor to escape.

As long as you haven't burned your bark, you should be okay.

Reminds me if the time I began an extract after roomies went to bed and then fell out myself with an acid boil going then woke to an acrid smell, smoke alarm, 500 grams of wasted ACRB and a really pissed friend.

I just do acid soaks now.

I did something similar with some syrian rue Half a kilo of ACRB would've been worse though, for sure.