Flight Attendant Sent Crashing Into Ceiling By Violent Turbulence...VIDEO

Bad news for nervous fliers!

Whether it's delayed departures, lost luggage or long lines at security checkpoints, flying has long presented a myriad of challenges.

But now scientists point to perhaps an even bigger concern: an uptick in severe turbulence that can cause sudden changes in altitude and nasty injuries. 

The British researchers have found that severe turbulence has increased 55 per cent since 1979, and will likely get even more common as the planet warms.