Mathias
Active Member
When i was in my first year of high school, everyone used to use this. I swear it almost drove me insane... hardly got any work done.... You walk around school and all you hear is this damn high pitched noise. 
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Need to go home and try this out on my kids. Didn't hear a thing.
Cant hear a thing (41)
Defiantly going to test it tonight on the kids
Weapon of mass destruction....