xkcd #2940: Modes of Transportation

https://xkcd.com/2940

Explain xkcd #2940

Title Text:

My bold criticism might anger the hot air balloon people, which would be a real concern if any of them lived along a very narrow line directly upwind of me.

alt-text:

A chart that categorizes various modes of transportation based on their practicality and danger level:

Zone of Practicality:

  • Trains
  • Airliners
  • Boats
  • Walking
  • Cars
  • Scooters
  • Bicycles

Zone of Specialty and Recreational Vehicles:

  • Motorcycles
  • Helicopters
  • Light aircraft
  • Go karts
  • Skateboards
  • Rollerblades
  • Skis
  • Unicycles
  • Sleds
  • Bumper cars

???:

  • Hot air balloons

“Hot air balloons are the optimal mode of transportation, if your optimization algorithm has a sign error.”