You're deep in a tournament. The bubble is approaching. You’ve got a serious shot at locking up some money. The adrenaline is kicking in, and your instinct is to tighten up. Big bets become small, small bets become checks. That instinct is usually right, and solvers have backed it up for years.
Key word being 'usually'.
According to the GTO Wizards, sometimes the best play is the complete opposite. GTO Wizard’s postflop ICM solver shows that in certain high-pressure spots, the right move is to shove the flop. Even if it means betting two or three times the size of the pot.