What are you kicking Eddie Murphy in the ass for? I only count three of his movies, and to be fair - one of them is CALLED 'Showtime', so it's bound to be said a couple of times...
There's a simple explanation for the Praxis ring - they stored all their shit in a belt around the moon, hence the plasma rings. Use your brain, 'astronomer'.
Ironic, considering the US was one of the first countries to adopt the SI (metric) system back in the 1700s as a symbol of solidarity with the French. Americans, get your stuff together and start using a system based on science instead of hog's heads and king's arms.
A slightly better solution than the one the doctors decided was necessary for my polydactylist aunt - they made her mother tie string around the extra digits so tightly that they eventually went necrotic and fell off. Ah, modern medicine!