[dripik]

I think Kyle is refering to the Hydroponic Vats, right after the area where you can control Munch for the first time in the game (Fuzzle Testing). The 'monsters' must be the Slogs around those walls which have an opening. These are marked by those small green arrows, indicating that you have to jump through them.

Appart from what Max said, there's nothing special about that part. At first, I also found it hard to make Munch jump in the right direction, but it only takes some practice.

Hope that cleared it up.