The Sonic Bomb Alarm Clock was designed to wake up the even the most stubborn sleepers. The clock can produce a heart-stopping 113 db alarm – enough to wake you up along with your neighbors. It comes with a 12 volt “Bed Shaker” to scare the living daylights out of you. Thankfully, the volume can be adjusted to saner levels.
You can buy one for £28.99 plus taxes.