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Tony Stark once pointed out a considerable fault withThe Flash’sspeed powers , asIron Manadmitted that not only did they not make any sense from his perspective , but they would n’t mold the same in his universe . InJLA / Avengers#3 from Marvel and DC Comics , the heroes work together in an heroic crosswalk , as Stark watched Barry Allen employ the cosmic salt mine . However , he quickly realize that his magnate might not be operational in certain worlds since dissimilar physics would prevent him from accessing them .
The Flash ’s great power come from the Speed Force , an extradimensional energy source concede the Hero of Alexandria a wide array of ability , including tops - speed , energy manipulation , and even a healing constituent . By tapping into the Speed Force and his tops - speed , The Flash and sure powerful speedsters can also travel through timeand different realities with the Cosmic Treadmill . However , when Iron Man first take care the time - traveling gadget in action , he pointed out a considerable defect that would come about if Flash tried to use it in the Marvel Universe as defend to the DC Comics world he ’s from .
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InJLA / Avengers#4 by Kurt Busiek , George Perez , Tom Smith , and Comicraft , the Justice League and Avengers worked together to restore reality and take on the villain Krona , who has conflate the DC and Marvel Universe - causing the world around them to change continually . Iron Man and The Flash concoct a planto get to Krona ’s fastness , using Thor ’s hammer Mjolnir and the Cosmic Treadmill to break through his shields . However , when they combine their might , Tony Stark points out that the Flash ’s stop number prison term - travel mightiness have one considerable flaw : they would n’t work the same in his world .
While their plan is a success , Iron Man portion out that The Flash ’s dimensional change of location powerswouldn’t work out on his Earth establish the speedster might have trouble if he end up in a proportion where physics dissent from his mundane reality . Tony Stark admits convert swiftness into a vibrational wave that shifts the temporal - dimensional locus " would n’t work back home " in the Marvel Universe . It ’s a defect in The Flash ’s powers he needs to look at should he ever end up stuck in a world where he needs to escape via interdimensional travel .
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