28 May,2012 09:38 AM IST | | AFP
The Brit said it happened several times as he completed the 78-laps race. Hamilton said: "The guys hold the pit boards over the track and two or three slips fell out and hit me in the front of the helmet.
I was like âguys this is getting ridiculous' as they kept dropping them and dropping them."
It was a disappointing race for Hamilton who started third but lost places, notably in the pits again, to finish fifth.