MOTOGP rider Tito Rabat is to undergo emergency surgery after suffering a broken leg in a horror smash at Silverstone.
Heavy rain caused chaos in qualifying, which was delayed due to the downpour, before Jorge Lorenzo took pole.
The Avintia Ducati rider had come off his bike and was walking away when he was struck by Franco Morbidelli's bike in FP4, sending him flying.
He lay on the ground before being treated 'for multiple injuries' by medical staff, according to an update from MotoGP via Twitter.
The Spaniard was then flown to the University Hospital Coventry with his team saying he had multiple fractures to his leg before later confirming a broken femur, fibula and tibula.
Lorenzo and Aleix Espargaro both fell before Suzuki's Alex Rins jumped off his bike at over 100mph at the Stowe corner.
Rins later said about the incident: "What happened today was incredible, I have no words to describe it.
"I saw Tito, but he was on his back. I screamed at him and I made gestures, but he could not move.
"I saw that Morbidelli was also losing control. I could not prevent his bike from hitting Rabat's leg and throwing him two or three metre away. It was a brutal impact."
After qualifying, Lorenzo told Movistar TV: "We are worried about Tito and let's hope it is not serious.
"We will see how much water falls tomorrow and what happens in the race."
Rabat is in his third season in MotoGP and the 29-year-old currently sits 14th in the standings.
It was the second heavy crash for Rabat this year after he escaped an incident during a tyre testing session at Barcelona in May.
On that occasion he picked up only a small muscle rupture on his left arm that did not mean he missed a race as a result.
Speaking to Movistar TV at Silverstone, doctor Angel Charte revealed Rabat's life was not in danger but that he had been sedated to cope with the pain before being sent to hospital for a number of checks.