The accepted way here of eating them is to hold them in a fist with the thumb turned inward and the nail pressing about half way up the fruit. The rind then cracks and a twist will pull it off. Pop the fleshy part in your mouth and then discreetly remove the stone. If the rambutan is properly ripe the flesh comes off the stone very easily. If it isn't it sticks to the stone and you lose half of it.

Bingley

Bingley