The worst I ever did was while installing a 3 sp manual in a car. I was laying with my head up towards the front of the car and the trans on my chest. This way I could see when I had the input shaft going into the T/O beg and the clutch disc. At first you have to tilt it lower in the back to slide it in. I had already filled it full of 90wt lube thinking it's easier to put it in now rather than after the trans is in.. Since the drive shaft was out a lot of the 90wt ran out. I was skinny then, my Levi's were loose at the waist band and it was cool not to wear underwear then so all the nice warm 90wt ran down into my pants and all down around my nuts. Since it was warm I didn't feel it until I got the trans in and crawled out from under the car. What a sticky/smelly mess to clean up ! I never was able to wash that smelly lube out of my pants so I had to throw them out......Bruce