Nico Rosberg says that 'pure luck' prevented him from suffering a sizeable crash during the second free practice session for the Belgian Grand Prix.
Rosberg clocked the quickest time during both sessions on Friday at Spa Francorchamps but suffered a frightening moment when his right rear tyre failed on the section of track between Stavelot and Blanchimont.
Rosberg was pitched into a high speed spin but fortunately came to a halt just short of the tyre barriers at Blanchimont.
"The circuit is fantastic and our car seems to be quick again," he said. "It felt great out there and I was happy with my pace.
"In the second session it was quite a shocking moment for me when my rear tyre failed.
"When you are going as fast as 300 km/h and something goes wrong, that's a horrible feeling.
"I thought I would end up in the wall and, to be honest, it was pure luck that I didn't. We now need to investigate with Pirelli what happened."
Team-mate Lewis Hamilton was second quickest but says he has no concerns after Rosberg's failure.
"What happened towards the end of P2 with Nico obviously wasn't good but luckily he's unhurt and of course the team will be looking into it with Pirelli," he said.
"I have no concerns, though. You have to have trust in the car and in the tyres to go out there and push, so it's not something you think about."