My brothers and I used to have yearly fishing tournaments, anywhere from a weekend to a week.
Five of us, and three took it way too seriously, and by the second or third year, in addition to the sometimes not-so-nice trash-talk, there were pranks and sabotage involved.
One brother was bragging, in the weeks leading up to the annual tourney, that he had special secret extra-delicious-to-the-big-fish minnows, minnows so extraordinary it would guarantee his win.
He wouldn’t shut up about it, so brothers #2 & #3 got into his truck and put minnows everywhere - under the seats, in the door pockets, under the carpeting, in the air vents…everywhere.