Here's what I do recall . Things started off on the wrong note when my flight out of Vegas was delayed for an hour . Then I waited another hour for my bag to make it to the carousel , only to find out that my bag never made onto the plane in the first place . Bag ETA Friday morning between 9 am and 1 pm . 
Question: What may be the reason for things starting on the wrong note ?
My transportation didn't arrive on time .