TBH, THIS is one of the biggest headscratchers in Fallout 3 for me! I honestly can't comprehend how Harold of all people was able to reach the East Coast without a scratch, it really boggles my mind on how he was able to do that, and especially in his current state with that weird tree mutation coming out of his head. Also I don't recall him ever explaining why he decided to leave Gecko for the East Coast, was that ever explained anywhere else in the game on why he left? Seriously can someone please tell me how the heck did he get to the East Coast!? And what was his reason for leaving Gecko in the first place for The Capital Wasteland!? I mean, the only other character I can think of that was able to move from the West Coast to the East Coast in Bethesda's Fallout games, is Kellogg from Fallout 4. But even with Kellogg, I can at least see him being able to reach the other side of the country, Harold on the other hand well, he's just Harold. He's definitely not the type to be able to fight whatever horrors that roam the vast hellscapes of the wasteland, between the travels through the West and the East.