I found this interesting for shortest tournament games.
"A game between Fischer and Oscar Panno, played at the Palma de Mallorca Interzonal 1970, went 1. c4 resigns. Panno refused to play to protest the organizers' rescheduling of the game to accommodate Fischer's desire not to play on his religion's Sabbath. Panno was not present when the game was to begin. Fischer waited ten minutes before making his move and went to get Panno to convince him to play. Fifty-two minutes had elapsed on Panno's clock before he came to the board and resigned (Brady 1973, p. 179) (Wade & O'Connell 1973, pp. 344, 410). (At the time, an absence of sixty minutes resulted in a forfeit (Brady 1973, p. 245).)"
Perhaps Panno thought Fischer was cheating.