Posted Jul 16 2017 - 01:38 AM
From Denis Jenkinson's report of the first lap
"As they moved down to the start line An anxious Jochen Rindt was in the centre of the front row, with Surtees on his left and Stewart on his right, and rain-clouds could be seen over the hills ahead of them. It was indeed strange to see Clark and Graham Hill side by side on the fourth row of the grid as the flag fell, some seconds prematurely, Clark was not ready and got left behind. The leaders were over the Eau Rouge, with Surtees already in front, as Clark gave his Lotus-Climax a great bootfull of revs and stormed off in pursuit. The cars were still within earshot when the loudspeakers, announced that the rain previously reported at Stavelot had now reached Malmedy, and the order was Surtees (Ferrari), Rindt (Cooper-Maserati), Brabham (Brabham-Repco), Bandini (Ferrari). and Stewart (B.R.M.), and then there was an announcement that Bonnier and Spence had gone off the road at Burnenville but were unhurt"
No other mention..
Perhaps something got garbled in other reports and kept being repeated. It seems unlikely that the car could have gone through a window and then ended up where it came to rest. Bonnier was very lucky that it did not go over the wall backwards or he would have been underneath it down below.