The air conditioning units in The Secret Lair do not utilize chlorofluorocarbon, hydrogenated chlorofluorocarbon or hydrochlorofluorocarbon refrigerants, nor any compound with an "R-" designation. Instead, a series of cooling tunnels connect the HVAC system in the Lair directly to Earth's polar regions. Though not officially recognized by Guiness, the cooling tunnels are the longest bobsled/luge runs on the planet.
You can bobsled or luge in your HVAC system? That sounds like a breach of security waiting to happen. If you haven't already, I suggest high energy UV lights coupled with a laser array. The array I suggest is similar to the one Umbrella corporation uses in the Resident Evil movies.
Rest assured that if I had meant to indicate that the toppling of dominoes in The Secret Lair is forbidden by decree of the Overlords or for any reason whatsoever I would have used words to that effect.