I think it was mostly just trying to make the most of a bad situation. We were over a hour away from anywhere when their grout pump goes down. Probably 5 hours away from anywhere that might have a replacement pump(doubtful). No cell service. No real plan once the grout pump died, so they spent two hours trying to get the pump regoing. Prime, clean out, remix grout, pump. Plug up the lines, reprime, no pump, clean out- repeat, repeat, repeat.
And no one likes to beat their head against the wall, so they tried finishing up the one they had started with the buckets and a hammer, sometimes it just takes someone else saying "I know what you guys are trying to do, but it isn't going to work, and you just as well quit now, it ain't going to get better".
I'm sure they ended up taking that form back off, cleaning the grout all up with a hammer drill and chisel bit and starting over once they got a different pump. Its just no fun getting beat.
I will admit I had some worries myself on that job. There was a inspector from the feds there the whole time. I could see a "natural disaster" of epic proportions if I lost a hyd. hose. Fortunately that didn't happen, but the thought goes through your mind, because the feds sure won't care that sometimes lines give out.