RE: the McLaren.
Can't tell you if the car is authentic but that little dity occured at Road America a few years ago. Those are all my pics. Reportedly, the fellow covered in muck was near the tail of the traditional evening parade into Elkhart Lake following the Brian Redman vintage challenge when the throttle stuck. He also had a teen (son?) riding w/ him. Both were fortunate to have not been killed. The fellow (Johan?) who was first in to rescue the pictured guy claimed that he asked if the driver was OK. The driver affirmed that he was intact and Johan replied "good". The next thing the driver said was along the lines of "it's not my car" to which Johan said "Even better!!".
Road America has seen some pretty ugly vintage carnage of late. Not my pic below.