Tools, a bloody nighmare with a mind of their own, seen these incidents reported in trade magazines over the years and 2 from experience.
Chuck keys can be thrown 30ft and still go through a glass window if you leave them in the chuck. (Witnessed)
A socket left in a jet engine cowl makes a lot of noise and creates impressive flames when started (£2,000,000 damage)
A hacksaw left on a bus bar in HV switchgear cause switchgear to make a lot of noise, sparks and smoke.
A spanner left under the seat of a Pitt’s Special (aerobatic stunt plane) can hurt your teeth a lot if you do a loop.
When working on the top of a large transformer, make sure Tools are tied on to you, if they drop into the transformer they are virtually impossible to recover, took 2 days to recover a Allen key, required a very creative solution involving plastic pipe, endoscope, epoxy resin and lots of swearing. Magnets no good as stick to case and core.
May the Ford be with you