I wager that the whole purpose of throwing the tentacles into the air is to provide the dying organism with a lack of stimulus to the neurons in the tentacles f

I wager that the whole purpose of throwing the tentacles into the air is to provide the dying organism with a lack of stimulus to the neurons in the tentacles for a few seconds, on water impact, the renewed stimulus would make the tentacles move. I reckon after a few tries the tentacles just run out of energy. This is just a thought and may not be correct.