A koala is sitting up a gum tree ... smoking a joint when a little lizard walks past and looks up and says, 'Hey Koala ! What are you doing?' The koala says: 'Smoking a joint, come up and have some.' So the little lizard climbs up and sits next to the koala and they have a few joints. After a while the little lizard says his mouth is 'dry' and is going to get a drink from the river. But the little lizard is so stoned that he leans too far over and falls into the river. A crocodile sees this and swims over to the little lizard and helps him to the side, then asks the little lizard: 'What's the matter with you?'
The little lizard explains to the crocodile that he was sitting smoking a joint with the koala in the tree, got too stoned and then fell into the river while taking a drink.
The crocodile says he has to check this out and walks into the rain forest, finds the tree where the koala is sitting finishing a joint, and he looks up and says 'Hey you!' So the koala looks down at him and says:
"Shiiiiiiiiiiit dude ... how much water did you drink?!!"