| Groundhog |
Or really, anything that can replace Knowledge(Engineering) with something else would be cool.
Obviously, the agenda here is to combine with the Investigator's Applied Engineering talent, to sing at stuff until it explodes.
Comparing how strength checks and Knowledge(engineering) checks scale, and further looking up the break DC of things like stone wall, heavy doors and cell bars we see that the ability is already nicely ridiculous, but I'd like to add further sillyness by being able to sing at objects (or play my lute, whatever) until they explode.