i don't even know what frogging is, but i'm guessing its the ladder jumps/boosts at the part with two buttons.

i feel like it should be glitchless due to the fact that anyone can do it, its just a matter of luck based timing with when each person jumps. for example, every time me and @Saved tried to do this, i would hold jump and pray our characters boosted each other as most of the time it wouldn't even work and one of us would fall lower or fall off.

The thing with frogging is that players can gain practically infinite height using it. I can see that you weren't intentionally trying to do this, but the ladder boost is still a form of it and is considered a glitch by most people.