It's to do with this link and the that one of the suggestions for the image challenge was paxman vs dinsaours
https://www.youtube.com/watch?v=1KHMO14KuJk
(
CysticSpazzGland has just puwked on your mum,
Fri 8 Nov 2013, 19:02,
archived)
So
no punch line, eh?
(maybe you needed a "we'll just have to leave that there" or something.)
(
tubaman,
Sat 9 Nov 2013, 5:05,
archived)