Sonic the Hedgehog 2/Chemical Plant Zone
A zone themed on a large industrial plant, producing the deadly Megatox compound (the strange pink water).
Act 2 edit
The Boss of this zone is a goo shooter piloted by Robotnik. The platforms on the left and right keep disappearing. You will loose if you fall down. Robotnik will suck up water in his machine and when full will aim the bucket at you. Robotnik is vulnerable while he is sucking up the water, however he does it over the disappearing platforms.