A palm bearing about 5000 coconuts in the same time
This freaks was found on Youtube. It seems that there is water inside the young fruits, but I dont know if the fruits reach the stage of full maturity, with a complete embryo.
A quite similar phenotype was observed by myself in Tonga on a Compact Dwarf Coconut (Niu Leka type). I this case, the pollination process was not complete and most of the fruits were empty and came from a parthenocarpic develovpement.