Dang...

Yes it's in one of his slant six videos for that gutted shell of a dart. He did some follow up talking about poor quality parts, showing his crank gear cracked through the keyway, right where he pounded it onto a crooked crank key.
Well.. A: if the gear isn't sliding on then something is wrong.. stop and figure it out.. probably a burr or something from him hammering the last gear off :) But to hammer on a gear til it breaks.. just wtf all around. I'm a backyard hack but even i stop when **** isn't working how it should.