My poor nephew, Master Sunshine, was suffering from a particularly nasty bout of it last weekend, it lashed out in full force. (There he is, the guy with no ground beneath his feet.)
Luckily this nasty dose of the jumping gene coincided with his Regional Skateboarding Championships, and he managed to turn the evil jumping gene's power to good - and he won.
*Aunt Laughy Hen gently bustles her feathers and quietly clucks proudly.*