VIDEO: Military Dad Surprises Son, 11, During Heartwarming Royals First Pitch

Tuesday was a big enough day for Austin Sides.  The 11-year-old was already pumped to be selected to throw out the ceremonial first pitch before his beloved Royals faced off against the L.A. Dodgers at Kauffman Stadium.

Little did Austin know what was in store for him, as seen in this video posted to Crave sports site NESN.

Because it was only after hurling the pitch to the fully-uniformed catcher did the "player" remove his mask to reveal himself as Austin's dad, U.S. Air Force Major Robert Sides, returned from a year-long deployment in Kuwait.

The look on Austin's face says it all…priceless.