Elon Musk is all about improving infrastructure and making it easier and more environmentally-friendly for people to travel from point A to point B. Interestingly, the outspoken chief executive doesn’t have much faith in flying cars.

While speaking at a recent event for The Boring Company, Musk plainly stated that flying cars could prove a serious health hazard to the general public, reports CNET.

“There will be zillions of these things flying all over the place and, inevitably, somebody’s not going to service their car properly and they’re going to drop a hubcap and it’s going to guillotine somebody,” he said.

Many people believe that flying cars could solve many of the world’s current transport issues and understandably so. As our roads get more and more clogged, it’s hard not to look towards the empty sky and imagine all the free space above us.

Unlike these people, Musk is looking underground. Literally. Beyond his work on a high-speed Hyperloop that could transport passengers through vacuum tubes at over 600 mph (965 km/h), Musk is aggressively pursuing his Loop system.

The product of The Boring Company, Loop will ferry paying passengers underground through a series of tunnels in small pods. Loop will then start to accommodate passenger cars through its network.

Note: AeroMobil 5.0 VTOL Flying Car Concept pictured