Dale Shelton was the technical consultant for Mission: Impossible – Ghost Protocol (out April 17th on Blu-ray and DVD), lending his unique perspective on weapons and gadgets used in the field by rogue IMF agent Ethan Hunt (Tom Cruise) and his team.

For this fourth installment in the franchise that gear included retinal identifiers, a magnetic suit that allows Agent Brandt to float in mid-air, and sticky gloves that prevent Cruise from falling to his death as he ascends the Burj Khalifa, the tallest building in the world.

Shelton has a background in Federal law enforcement and tactical SWAT teams, so we were excited to pick his brain about how close the tech used in "Ghost Protocol" is to reality.