Tried to replace a very simple part in my wife's car tonight, the front passenger side motor mount of a 2004 Nissan Altima. Got everything except the last dead center bolt all done and gone. Managed to cross thread and sheer the head off the bolt. In the pic, you see a bolt, a center sheered off head of a bolt and then the outside bolt that's sort of a silver that threads in from underneath. Why did I ever buy tools? Most awesomely stupid part you ask? It's less than 48 hours before we take the dang thing on a 4 hour drive to visit my dad in Nashville. And the wife's got a college exam tomorrow over an hour away, so she needs it. Could I get more brilliantly incompetent? Only if I actually got paid to do such mega doofis manuevers. So, in the AM...I call a mechanic and ask "Is it a bad idea to drive it until we can afford to have it repaired?