Tottenham boss Andre Villas-Boas knows fans can quickly turn.
AVB is in danger of being crowned 'London's Most Popular Top-Flight Boss'.
Quite amazing given the manure that was thrown at him before, during and after his ill-fated 256-day spell in charge of Chelsea last season.
Villas-Boas said: "The fans are the best critics of performances. When they don't like it, they criticise you. When they like you, they congratulate you.
"At the moment it is positive because we are on a good run. But everything can change.
"In this business we go from being the best to being donkeys very quickly. That is the nature of the game and management."