While cleaning a lamp a genie popped out and granted me a wish?

he said he was having a bad day, and instead of the usual 3 wishes i could have one and be thankful.He also said that he would give me a choice of two;wish one the ablity to fly like superman;or wish two the ablity to swim underwater like the man from atlantis.He has given me until thursday to decide,(away at national genie conference) what would you choose, fly or swim?flying obviously is pretty cool but imagine being able to swim to the depths of the ocean?hmmm, need help it's a big decision don't want to regret my choice thanks