The first time the player uses hologram he sends it across the bridge. The second time after a lapse in fighting he aims the hologram to the floor next to where he is standing. The players then runs across the bridge in a straight line pretending to be the hologram. After the enemy dismisses him as a hologram he opens up fire and kills the other team.
Genius.
This next video uses the hologram to confuse the enemy and claim a nice double kill. Good work.