Joe Girardi did a nice, long in-game interview with the YES Network during the Yankees' Grapefruit League game against the Phillies. Mid-way through the conversation (about the 2:18 mark of this video),
bench coach guest instructor Willie Randolph made a very deliberate surprise appearance.
I highly recommend watching and waiting for it at regular speed, but here's a GIF via River Ave Blues:
God, the face is absolutely perfect-- the way the mouth turns upside down to mirror the movement of the head! And Randolph managed to go unnoticed, too, until the announcers pointed it out. Photobombing is an art, and this here is high art.