Upgraded to 1st Class!!

Took an early flight out of Vail and Denver on standby which priceline doesn't recommend. Sat in first row on flight from Eagle/Vail to Denver. Denver to Phoenix was sold out and clerk told me little chance of getting on. Waited for Denver flight and when flight was almost loaded clerk anounced my name for the standby and told me I'll be sitting in 1st Class - second row window seat!!! WOW!!