The teacher asks little children:
" Children, what do you do if you're in a forest and you see a bear coming? "
One of them raises his hand.
" I start running to the first tree i see."
" What do you do after? "
" I climb on that tree. "
" What if the bear climbs after you in the tree? "
" I climb higher. "
" Yes, but what if the bear keeps following you in the tree? "
" I climb highest I can. I go to the top. "
" And what if the bear comes after you in the top of the tree? "
" Hey, get outta here! I can see you stand on the bear side! "

Two cops in the police car:
" Hey Mac, get you head out and see if that thing on top of the car is still working or not. "
Mac looks out and says:
" Yes, no, yes, no, yes, no..."

Someone walking on the street heards talking beyound some bushes:
" And remember, put the green side up, ok? "
Being curios, he jumps on his feet and takes a look inside.
Guess what! He remains stunned when he sees a detachement of cops planting some trees.