Don't even know you but unless you're doing this with a bungy cord short enough to keep you from getting hurt, a trampoline or safety bag below, or the window is on the first floor, then no.
[|87 :: Depends on how h;gh the w;ndow ;s. 1f the fall ;s lethal 1 adv;se aga;nst ;t. But ;f ;t w;ll only cause m;nor or ;nconven;ent ;njur;es then sure go ahead as ;t would be qu;te comed;c.