Obviously a bit of over-the-top hamming it up for the camera's benefit. That is a HotSpring Spa with ZERO dangerous suction fittings in the spa, therefore, "Jack" could not have been entrapped by the insidious bypass valves prevalent in other spas.
I despise movies that don't take the time to do the research and use the correct props, ie The Matrix, when Nemo is firing the HK MP-5 9mm submachine gun and .223 brass is seen hitting the ground. It ruins the whole movie.
Terminator