Here is the second portion to round out the experiment list of CrazyRussianHacker:

6 – Dry Ice Smoke Ring Launcher – Science Experiment

5 – How to Open a Can with Your Bare Hands – Zombie Survival Tips #28

4 – Self Freezing Coca Cola

3 – Amazing Bubble Science Experiment

2 – How to Make Your Shoes Waterproof

1 – 2 Pounds of Dry Ice Experiment

Which is your favorite and why?  Feel free to comment.  And it is ok to laugh too there is some comedic delivery in a few.

And a reminder definitely do not try any of these without the supervision of a professional!