History
Natasha Romanoff, along with the Hulk, infiltrated a Hydra base that was heavily booby-trapped. After successfully navigating her way through a laser grid, Hulk simply walked through all of them, causing a trap door to open beneath their feet and a timed bomb to be placed right next to them. After failing to diffuse the bomb, Hulk simply sat on it and took in the entire impact of the bomb, causing his pants to rip open in the process. Seeing Hulk's heart-shaped underwear caused her to laugh as he walked away.[1]