https://m.youtube.com/watch?v=aYQnuuFfGiA

There is a specific barrier that ru can’t cross

Hey Kele, to do this glitch, you have to play this game unpatched and this can only be done on the disc version of the game. This is the case with a few other glitches in Uncharted 3 as well. Hope this helps! :)

Helped yes thank you very much.

think I'll do the Glitchless speedrun

Quite late however you don’t need to do this unpatched, however it’s way slower and you need to climb the bus at an odd angle :)