Hmm... walk to the eerie circus that matches the various monstrosities you've already seen, stroll through the dark and foreboding forest, or go to the apparently harmless lake. Seems like a no-brainer - you take the lake.
It doesn't take you long to reach the body of water, and even up close it definitely looks normal. Just the gentle water, rippling ever so slightly in a light breeze. It's about this time that you realize that your night started off normal, and that's what ended up getting you into trouble. In fact, if you hadn't been going for an apparently normal stroll earlier on, you never would have run into those monsters in the first place, never would have fallen into that hole, and never would have ended up here. In fact, the forest and the circus seemed like blatantly obvious traps... maybe too obvious...
You turn to leave the lake and go back the way you came, but as you do you immediately come face-to-face with yet another latex monstrosity. This time, the thing seems to be a man-frog with a slightly cartoonish style, with most of his body completely green while his belly and chest are white, a white which stretches right up to his lower jaw. He eyes you with the large eyes of his wide froggy face, his entire body apparently tensed and ready to leap at you within a mere second. The mere sight of all this is enough to immediately make you begin to scream.
Unfortunately, screaming seems to be exactly what it was waiting for. The second you open your mouth, the man-frog shoots its long red tongue straight at you, forcing it right down your throat. You can feel it slithering down your esophagus and wriggling right into your stomach, and the sheer disgust it brings you is enough to incapacitate you. However, it seems that the monster isn't finished with its tongue's intrusion, as you almost immediately hear a hissing emanating from your gut. Looking down, you see your T-shirt moving up around your belly and immediately pull it out of the way to get a better look. You can only watch in horror while your gut slowly expands, gaining a shiny sheen while its color shifts from that of the rest of your skin to the same white as the man-frog's own belly. It isn't until your gut's expanded to a full half a foot larger than what it used to be and clearly ceased to be human flesh that you come to your senses, realize that you have to fight this, and grab his tongue. Tugging as hard as you can, you pull the thing right out of you immediately, watching as it continues to spew an odd greenish gas from its tip even as you toss it away. The creature, apparently hurt by this, immediately flees into the night.
You breathe a sigh of relief in having stopped the assault before you were forced to change into... whatever the heck those things are. Your belly seems to be a lost cause, now quite a bit larger and rounder than it should be and with the definite look and feel of white latex, but you seem to be completely unchanged everywhere else. You'd love to ponder more on why it'd target you there specifically, but at the moment you really feel it'd be best to focus on getting out of there.