Upside down artillery twice

[displayfireworks1]

In this video, you will see someone load and fire an artillery shell twice. The more I look at this the more I am seeing it happen. If you are in a hurry, go to 41 sec and 1:07 sec.

http://www.youtube.com/watch?v=Nl-2lNo4n6Y
For someone new at this please note the sound an upside artillery shell makes.

[PyroManiacs]

Wow, idiots!

[Jdrobinson13]

You know most of them probably had no idea what exactly happened either.