

Comics are weird. Asking questions like, could the Flash run so fast he exits the universe can almost always be answered with “if the plot calls for it.”
He has the power of fast. He goes exactly as fast as he needs to. It’s magic, not science. They make it sound like science but it’s magic.
Kinda like how Tony Stark invents time travel in an afternoon, or Peter Parker affords an apartment in NYC of even only barely.
Yarr, thar be an alternative. Though some might’n be thinking acquiring such booty be illegal.