After watching this I hope it makes you be even more careful the next time you are in a tunnel. Apparently many people lose control either due to not able to adjust when entering the tunnel, or simply don’t look careful enough before they change lanes.
It seems this tunnel has a video camera built in and thus has captured many of such incidents. Sometimes you simply don’t expect the guy next to you to lose control! The bottom line is…better make sure you are adequately insured!