Grid walk :

The grid walk occurs between the grid opening and the cars leaving for the formation lap. Dignitaries, celebrities, team members and media have access to the grid to move amongst the cars and drivers. 

Martin Brundle, Sky Sports, has a segment called the Grid Walk where he wanders through the crowd identifying and talking to anyone of note. And it would be fair to say, that anything can happen and it often does. 

Ther are other times that the grid is open to certain ticket holders to walk from one end to the other, but this is well outside the hours that teams have access to the grid. 

Andrew Burden

The author Kiwi F1 Fan