Too many depressing race stories in here, so here's mine...
Finished assembly at the track, got 5 practice laps in then shock piston screw came off and made a mess. Fixed that and then a few more practice laps.
Qualified in the B-main out of maybe 15 entries total. I had to keep tightening the servo horn. $15 hobbypartz servo was glitching like crazy. But this tingling started in my fingers, and it started steering itself to the front of the B-main. Got bump to A-main (back to back main with no break!). Each lap I passed the drivers stand cosmic rays shot out the back and charged the hairs on my neck. As i watched it pass the competitors one by one, a sense of nirvanna swept over me, and the entire track and all spectators faded away, and it crossed the finish line in 1st place.

It was freaking miraculous! This is my first 4x4.
Then I let someone test it out after the race and the servo horn came off after maybe his 2nd lap.