Dumbest newbie thing,you did at the drag strip.....

All my friends came to see me run my Swinger. Unloaded checked the lugs and air in the tires. Friends started bs.ing and I ran thru tech and staged while they all watched down track. They watched, and watched, and watched. Till the track crew pushed me to the side.While I was shooting the bull with my friends I neglected to check the fuel cell. Had 5 gallons of race gas sitting on the trailer. doh. I still hear about it now and then.