Same breed as the one who drafts a bus down a twisting mountain road. Here's a clue: Most bus drivers are concerned about the safety of everyone around them. Sitting on a bus's bumper serves as a major distraction while they need to be focused on the road. Think again.
Off season, or crack of dawn for Sa Calobra or Formentor. Most of the other roads in the mountains have fairly light traffic any time of the day or any day of the year. Especially the Tramuntana south of Soller.
We were given some great advice there: you get tangled up in traffic on the descent, simply pull over soak up the panoramic view. Get going again just before the next clot of traffic arrives and enjoy a stretch of clear pavement. Repeat as necessary. AFAIK there are no prizes for getting to the bottom fastest. On many of the switchbacks the busses have to virtually stop to make the turn even if there is no other traffic.
