Clip captures Elon Musk's reaction to Falcon Heavy launch

In the middle of this live stream image of the car, on the center screen, are the words'Don't Panic'. This a reference to The Hitchhiker's Guide to the Galaxy, the 1979 book that was first in a series by Douglas Adams about an accidental space traveler, Arthur Dent Two of the Falcon Heavy's reusable boosters - both recycled from previous launches - returned minutes after lift-off for on-the-mark touchdowns at Cape Canaveral. Sonic booms rumbled across the region with the synchronised vertical landings. However, the craft's third and final booster missed its target - a drone ship in the Atlantic Ocean - by about 328 feet (100 metres). In a press conference after the historic launch, Musk said early reports show the rocket's central core'hit the water at 300 miles per hour (480kph) and sprayed the drone ship with shrapnel'.