Micro Sonic Grenade

When you activate the Micro Sonic Grenade, it emits a 115-decibel siren. The manufacturer describes this as a “prank,” which it might be if you think pushing someone out of a third-story window is funny. The customer reviews mostly complain that the device is not loud enough, which is a valuable insight into the mind of the typical user, as poorly as it may bode for society.