An implosion in the second half made the visitors look considerably better than they actually were. Until this point OP's had done nothing to justify their exalted position.
PJF had taken the game to them through a solid scrum and effective pick up and drive from their forwards. Hard work and a good team spirit saw PJF go 12-3 up as they scored 2 tries - firstly Dan Anderson, through a very determined aggressive run, and Dave Colvan off the back of a scrum. John Vellacot kicked a conversion and PJF were in command.
To give OP's their due, they realised that if they ran round PJF rather than through them they would score. And this they did 4 times in the killer middle 10 minutes of the second half. PJF started to come back but by then it was too late. Man of the Match was shared by try scorer Anderson, scrum Half Stuart Sorrel and Prop Simon Thelwell.