I know people seem to think that Tracy stopped him, but come on. Daphne could still move when Hiro FREEZED TIME. Tracy could have been Jesus Christ his own self and Edgar should have been able to zip past her, root through the stomach, and grab the key.
And for any who might suggest that Daphne's power was stronger then Edgars, Peter is still fast enough to zip up on to Boston for some chowder or soup or whatever it was in a matter of seconds. It's powerful enough to have grabbed that key before Tracy could blink.
Not that this is very important, just decided I'd nitpick a little. We all know the real answer to this question is "Because the story required it. Shut up and watch the show."
