There are times when tools from the shop shouldn’t be brought into service in the house. You know, like using a circ saw on a frozen side of beef, or perhaps trigger-clamping the mixer to a table and letting it rip.
In this case that’s exactly what happened. Officially this is a horrible idea. However, with just a few changes in the setup like mounting the entire rig to make it a bit more stable and using a strap clamp instead of a trigger clamp, I could see how it would work.
See Honey? You Don’t Need A Stand Mixer [There, I Fixed It]