You will come across a shooting gallery in level 9. Use the Plasma cutter have it on vertical firing mode. The goal here is to shoot all the red guys as fast as possible (if you miss a red guy you lose) and without shooting a single blue guy. It takes a little bit of practice but its pretty easy. You will get good prizes too.

Here's where it is:

[img]http://img524.imageshack.us/img524/4215/shootinggallery123gt3.jpg[img]