In Carry on Doctor, Babs sees a man eating a pear and says
eg. 'Ohhhhh...what a lovely pear'.
Man 'You can say that again'.
Carry on Camping
'what about those two things sticking out the front' circa Carry on Camping
Sid. 'Yeah, what about them'
Knitting, knit one, carry one, Usually for pearl knitting a sweater. Cable knitting.
Carry-ons (if your hardcore) can last for several days.
Steve: 'O shit yeah! Repent and carry-on!'