What Were They Thinking?

In what can only be described as a "What were they thinking?" moment,  4 teens in the U.S. were hurt when the van they were in crashed after the driver passed out.  What caused the driver to pass out? The teens were trying to hold their breath for about 1/3 of a mile. This caused the driver to pass out, the van hit a boulder, and luckily nobody was seriously hurt.

What penalty did the driver receive from his stupid stunt? A fine for driving in the wrong lane and possibly an honorable mention on The Darwin Awards  website.