Possibly the least significant item in the history of LOST hidden visual clues...
Jack, waking up in the jungle after the crash of Oceanic 815 (1st Episode):
And here's Jack waking up in the jungle after the "crash" of Ajira 316:
Notice his tie is pointing to the left after the first crash, and to the right after the second.
Wow. What does it mean? WHAT DOES IT MEAN!?!?!?!?!?!