This is a result of ones leg(s) lacking the needed oxygen to function properly. Difficulty walking or controlling ones leg(s) or feet and often appearing as a limp to a third party.
Texting, Tweeting, Instagram, Facebook, pinterest are all common causes of Spaceboots.
This can be alleviated by discreetly bending ones knees multiple times while rinsing hands to restore leg functionality prior to exiting the restroom.
Paul: I got a wicked case of spaceboots following a Instagram binge on the toilet.
uncle: "If there was no gravity on the Moon, how did Neil Armstrong walk on it? Without gravity, he would have floated off into space!"
nephew: "Easy, he was wearing space boots."