Nico Rosberg concedes it was "luck" and not skill that kept him off the barriers when his rear-right tyre blew at high-speed at Spa on Friday.
The German had a great start to second practice for the Belgian Grand Prix as he was quickest on the both the medium and the soft Pirellis.
However, his afternoon's running was cut short when his rear-right tyre blew, pitching him into a spin as he approached Blanchimont.
Despite travelling at over 300kph he managed to avoid the barriers.
"We don't know [the reason for the failure] yet and it would not make sense to speculate about it," he explained.
"It was quite a shock in the first moment because you don't expect it.
"Suddenly at 306kph or 190mph to just lose control completely because something failed at the right rear is not good.
"It wasn't down to my skill, it was just luck that I stayed away from the wall, but that was good."
Prior to the blow-out, Rosberg had clocked a 1:49.385 on the soft Pirellis which meant he completed the day quickest of all, 0.302s up on his team-mate Lewis Hamilton.
"It's going well for now," Rosberg said. "It's been a good start to the weekend. I'm feeling comfortable.
"At the moment I'm still one step ahead of Lewis and that means tonight he is more likely to take over my set-up than vice versa.
"That's usually the tendency, so it's always better to start the weekend like that."