Some people are probably going to hate me for this but I myself enjoy glitches and therefore I thought I might as well share this for others that enjoy them.
As you can see, the player in this video “jumps” onto a building on Lift. I have actually seen multiple people by now being at weird spots of certain maps so this guy is definitely not the only one knowing about it.
I have also seen people performing such tasks without being host and yes, also in Versus.
It is for now pretty inconsistent though.