When Webber was trailing Vettel, the German suddenly slowed down, reporting problems with his engine, and lost a few seconds to Webbo, who managed to get past very quickly. However, Vettel's problem seemed to be fixed very soon and he returned to posting competitive lap times. Any clue about what could have happened?

It's strange to think that it could have been a RBR call to let Webbo through because he was running a different strategy, because Vettel lost a few seconds there which he wouldn't have lost if he had just let him through but, on the other hand, it's difficult that an engine problem could be automatically fixed just like that. Has RBR made any statement on this? What's your view?