Mistake now the car seems to be blowing from the exhaust somewhere

Basically I took dog bone mount off, bolted it back to the subframe then something happened so had to leave garage, didn't bolt it back to the gearbox. Forgot about it, then all of a sudden after driving it back and forth the gearbox moved and wedged part of it on the anti roll bar I levered it back down and bolted it up. Now the exhaust sounds like it blowing

car is 2000 golf akl

Any advice?