One amusing one.
I had a shout from ops to go down and rescue some engineers who were sitting in a Puma burning and turning. I rushed out there and there were these two engineers with panic stricken faces sitting in a 330J with one engine at ground idle and the rotors slowly turning. They had got in to do a post chemo vent run and had inadvertantly started the engine and didn't know how to shut it down.
For those not familiar with the Puma there is a start panel underneath the instrument panel which has two engine switches. The first movement runs the starter motor and continuing to the spring loaded start postion starts the automatic starting cycle. To stop everything one has to position the switch back to the off position. They didn't know that; they only knew the run and off positions. They had inadvertantly move the switch to start and they were afraid to touch anything when the engine lit up.
A slight amendment to the brief for vent runs and it didn't happen again.