"Hey, what're you doing?"
The monkey replies, "Smokin' a joint, come up and have some."
So the lizard climbs up and sits next to the monkey and they smoke a few joints.
After a while the lizard says his mouth is 'dry' and he's going to get a drink from the river.
The lizard is so stoned that he leans over too far and falls into the river.
A crocodile sees this and swims over to the lizard and helps him to the side, then asks the lizard, "What's the matter with you?"
The lizard explains to the crocodile that he was sitting up a tree with a monkey smoking pot, got too stoned and then fell into the river while taking a drink.
The crocodile says he has to check this out and wanders into the jungle. He finds the tree where the monkey is sitting finishing up a joint.
The crocodile yells up to the monkey and says "Hey!"
The monkey looks down and says, "F*ck man! How much water did you drink?!?"