Go play softball wearing the helmet. It is very good for antagonizing the pitcher, and trash-talking in general. The helmet allows both for amplificat...
Here I show how you can very simply modify a megaphone to accept 1/8" line input from an iPod, and mount the megaphone on top of a motorcycle helmet. The resulting "Mega Helmet" delivers the maximal aural stupidity allowed by law.
Step 1: Get a motorcycle helmet
Get a motorcycle helmet. I picked up this Honda one at a yard sale for $5.