I was driving my work truck behind a group of 8 riders on I-8 west of Gila Bend. All of a sudden there was mayhem! There was black smoke, bikes were skidding, sliding and doing defensive driving maneuvers all over the interstate. I stopped to check on the group. The story went a Harley had lost all power at 75mph. The rider directly behind him ran into the rear of the disabled bike. All riders stayed upright but it was very ugly and could have been very bad. All this to say don't ride so close to the guy infront of you.