My favorite target fixation memory was back in 2018. Went on a groupie ride with some noobs on expensive bikes,. The noobs were in the last 1/2 of the group, When rounding a sharp corner, one fellow fixed on the ravine and down the hill he went. The next 3 bikes, fixated on the bike ahead and dutifully followed bike one down.
The order was BMW, BMW, (forgot), then a Harley.
Incredibly there were no major injuries, but some scrapes and there was plastic all over the forest floor. All the bikes and riders managed to limp home from the Minden area.
First we recovered the shocked riders from the bush.
Then the bikes. This is one of the Beemers.