The Dark Knight Skyhook actually exists.

[Soender]

Good reading actually.

The first human pickup took place on 12 August 1958, when Staff Sergeant Levi W. Woods, USMC, was winched on board the P2V. Because of the geometry involved, the person being picked up experienced less of a shock than during a parachute opening. After the initial contact, which was described by one individual as similar to "a kick in the pants," the person rose vertically at a slow rate to about 100 feet, then began to streamline behind the aircraft. Extension of arms and legs prevented the oscillation that plagued the person, as the individual was winched on board. The process took about six minutes.

http://en.wikipedia.org/wiki/Fulton_surface-to-air_recovery_system

 

[the_monk]

Sure does exist: http://www.youtube.com/watch?v=jTOX467D6PY

 

[Jokers_Wild]

If we're dealing with smugglers here, as long as they get their money they probably don't care who or what they're transporting...

I'd guess that Batman probably injected Lau with something to knock him for a day or so...he's still knocked out when we see him in front of the police station.