The Hulk possesses the potential for seemingly limitless physical strength which is influenced by his emotional state, particularly his anger. This has been reflected in the repeated comment, "The madder Hulk gets, the stronger Hulk gets." The cosmically-powerful entity known as the Beyonder once analyzed the Hulk's physiology, and claimed that the Hulk's potential strength had "no finite element inside." Hulk's strength has been depicted as sometimes limited by Banner's subconscious influence; when Jean Grey psionically "shut Banner off", Hulk became strong enough to overpower and destroy the physical form of the villain Onslaught. Writer Greg Pak described the Worldbreaker Hulk shown during "World War Hulk" as having a level of physical power where "Hulk was stronger than any mortal—and most immortals—who ever walked the Earth", and depicted the character as powerful enough to completely destroy entire planets. His strength allows him to leap into lower Earth orbit or across continents, and he has displayed superhuman speed. Exposure to radiation has also been shown to make the Hulk stronger. It is unknown how he gains biomass during transformation but it may be linked to the One-Below-All.