What's the Worst Ringtone You've Ever Heard?Today's XKCD raises an important question: what's the most irritating ringtone you've ever had the misfortune to hear?

Randall Munroe claims that the Buzzing Mosquito takes top spot, though admits that in his eyes it was a close-run battle including Clock Radio Alarm, That Noise from Dumb & Dumber, and Recording of a Sobbing Voice Begging You to Answer.

To that list you could, of course, add the Radar Beep, Machine Gun and... at this point, let's hand over to you. What's the most irritating ringtone you've ever come across? [XKCD]