Emit a high pitched scream

They always say go with your first instinct, so you open your mouth and say, "EEEEEEEEEEEEEEEEEAAAAAARRRRGGGGGHHH!!"

  Upon hearing the scream the driver mistakes your earsplitting noise for that of an ambulance or a police car, and quickly reduces speed like any good driver would.  Unfortunately, in keeping with the laws of conservation of momentum, you continue to move forward.  Only now instead of being kept in place vertically by the friction force of the Mac truck, you are now accelerating downwards at approximately 9.8 meters per second squared, in addition to moving forwards at a velocity of approximately 30 meters per second.

  So what do those velocity and acceleration values mean?  Well if you’ll kindly remember your high school physics, it means that when your body strikes the ground, you don’t even come close to surviving.

  You respawn in the middle of a large stadium, holding a mighty broadsword and surrounded by stadium patrons.  They all seem to be very excited about something.  Then another person enters the stadium floor, wearing mighty battle armor and holding a sword that makes yours look pathetic by comparison.  All around you the people scream a single word: "Blood!"  By this you conclude that it is now your goal to kill the guy who just entered the ring.  Bummer.

Unconfirmed