Science Experiment

Today in Machine mania, we did a scientific experiment on presure and evaporation.
Insturctions:
1. Pour alchohol(water is fine, but alchohol works better) inside a bottle.
2. Plug a cork into the bottle.
3.Plug a bicycle pump into the cork.
4.Pump about 10-15 pumps.
5.Pull out the cork with a sudden pulling action.
6. A cloud will form inside the bottle.
The pciture on the bottom is what happens before and after.