Controller.
As a new CFI I too found myself on a x country with student to find apon landing the aforementioned oil can hanging out the dip stick hole!, and a boom covered in oil!!!! One learn't to check that before strapping in
To add even more embaressment, I think I'm going to get it now... but on a very busy day teaching, was asked to fly a a photo flight, passenger was strapped in, I clamly jump in the 47, start up the engine, and wonder why the blades are not turning!!! engine off quick! jump out.... untie blades, jump back in, with very red face, and a very weak explanation to the passenger..... Never again
