He was talking about this earlier (albeit in relation to spin bowling) - how the macular degeneration he's got in his eyes has made it increasingly difficult for him to distinguish what's actually happened. He was also lamenting the lack of buses now visible from commentary...
Loved the look and Bairstow's face - sure he said something like 'haha, he's actually reviewing it' or similar as he grinned
Well done Jimmy - 500 test wickets is unbelievable for a fast bowler.
Fantastic cricketer..............already a better allrounder than Freddie I reckon and heading into Botham territory as you say. Batting, bowling and fielding.
EDIT - bollocks !