I had the privileged experience of being passed by Mike and Ralph Bryans during practice for the '67 GP of Canada at Mosport. They were cornering in tandem aboard Honda 6s, the sound of which approximated 18 gauge sheet steel going through a bandsaw; I had plenty of warning. They used the outer 6 inches of a very rough track surface, someplace I'd never go, all in the days before 'High-Occupancy Vehicle' lanes. Such a thrill!