Leaving TOAD running while pulling

There's one more caveat here that may not apply to the OP: if your toad has a turbocharger, many of them depend upon pressurized air to keep the intake-side oil seals intact. Idling such an engine for long periods of time can cause that seal to blow out, which will then dump the oil sump contents into the intake manifold. If your toad also has a diesel engine, that leads to engine runaway, which will completely destroy the engine. If it is a gasoline vehicle, you risk hydrolock as one or more cylinders fill up with oil.

I've had three turbo-diesel vehicles now, and the owners' manuals of all three cautioned against excessive idling. All three used Garrett turbos, so it may be other turbo makers do not have this issue. As always, YMMV.