I know this toipc is old but I'll reply anyways. Don't try to shoot your way out, instead, try to press V when you are close up to the window, almost like if you would try to jump through. Then, when directly after you've pressed V, press escape (ESC) and then abort. When you spawn in again you should be on the other side ; ) Good luck! If it wont work the first time then just keep on doing it again! It will work!