When the Mexican Jumping Bean jumps, it is because a moth larvae inside is moving around in it.

Inside the Mexican jumping bean is a little moth caterpillar.

The Mexican jumping bean is not a bean at all but a seed capsule from the Mexican shrub Sebastiana pavoniana. Inside the seed there is a small larva or worm of the Laspeyresia Saltitansmoth. When it feels warm temperatures, it begins to twitch, thus making the bean to appear it is "jumping". Eventually, the moth will hatch, and you will see the small creature leaving the seed.

The scientific answer is no-no it cannot drown,but if it is in the process of emerging and it gets in deep water besides just a tiny mist,then yes it will drown

Yes, there is no such thing as a "human Bean" Mexican jumping bean maybe.