Was playing casually.. after i talked to the stacked blocks to start the cheese mission i started to run to the cheese place. i took the first corner super close and randomly got boosted onto the roof. unsure if repeatable or how useful it is. Reminds me of the super mario 64 glitch on the clock map where mario boosted upwards thats they are trying to figure out.

Sorry for the late response but was it this?

This is a TAS only thing and really doesn't have any use outside of that.

even later reply. YES thats exactly what happened to me. what use does it have in the tas?

It's possible it may save time instead of jumping onto the boxes after feeding Marvin but there would be no other use I could think of.

Even later reply, this has happened to me before as well, I think Conker clipped into the wall and than warped him to the top.