I received this information from a friend, however when I tried, I was not able to reproduce it correctly. This is probably because I did not have the time to. The description is based on the explanation of my friend, I tried to be as specific as possible, however, because I have not been able to try this myself I can not guarantee it will work, I'm sure it does though.
(Edit: This glitch works 100% all the time when performed on the left hanger, your character doesn't merge quite as well with the concrete when done at the back of the right hanger.)
(Will add more information upon retesting)