THE U.M.B.L.E.S 
Are very very deadly they are signs of hypothermia. If you see someone that is very very cold, STOP, help them, this is a sign of U.M.B.L.E.S another sign of U.M.B.L.E.S is grumbling stumbling mumbling and memory loss.(scroll down) 
STUMBLES
to walk unsteadily or clumsily.
FUMBLES
fumbles is when you can not hold stuff right.
MUMBLES
mumbling is when you can not talk properly.
Grumbles
grumbles is when you get angry for no reason.