Exactly why I put pins on my bonnet..... After I put the bad-boy bonnet on there it caught the air even more and you could see it lifting at each side

One time on the way home on the M11 it did pop the catch (but only the one you pop from in side the car) and fortuantely didn't get passed the second catch (that you lift from the font) To say I shit myself wouldn't be an understatement
So I decided to fit pins. Didn't want to as I thought it would spoil the lines but thought it was better than having it lift on me..... After a while I grew to like em anyway