A method of masturbation, where the male takes his erect penis and quickly runs his hands down the shaft as if he was a fireman unrolling a long hose. When he ejaculates, he shakes the penis violently while making the sound of a water hose, to simulate a powerful fire hose.
A method of masturbation, where the male somewhat violently lifts his hands from beneath his penis, upwards towards his head in a flailing motion. The idea is to simulate an octopus flailing its tentacles, while stimulating the penis.
James was doing the octopus when his mom walked in to the room.