To lighten the tone:

Just in from a friend:
A koala was sitting in a gum tree smoking a joint.
A little lizard walked past, looked up and said: "Hey, Koala! What are you doing"?
The koala said: "Smoking a joint. Come up and have some."
So the lizard climbed up and sat next to the koala and enjoyed a few hits.
After a while the little lizard said that his mouth was dry and that he was going to get a drink from the river.
The little lizard was so stoned that he leaned over too far and fell into the river.
A crocodile saw this, swam over to the little lizard and helped him to the bank. The he asked the little lizard: "What's the matter with you?"
The little lizard explained to the crocodile that he had been sitting in the tree with the koala, smoking a joint, but got so stoned, that he fell into the river trying to take a drink.
The crocodile said that he had to check this out, walked into the rain forest and found the tree where the koala was sitting finishing the joint.
The koala looked down at him and said: ""Shiiiit, dude, how much water did you drink?"