wouldn't surprise me in the least. He was suffering and very ill, but still able to perform. Seemed weird he could physically go 3+ hours with flu/temp. However, something like food poinsoning (or whatever they put in his shit there), he would retain physical strength despite being violently ill.
could be he was just hungover... stayed up til 6 am gambling, drinking whisky, banging broads, smoking cigars and getting blunted, pop some dbol with breakfast, nap then play a game.