[pedant] if there’s a set up then it’s not a one liner.
That is not my dog is brilliant but only funny because of the previous bit.
You can even possibly argue that Morecambe’s ice cream van isn’t a genuine one liner as the siren is the set up. Without it – no joke. But I’ll let it pass, and add this one in similar vein:
[video]https://www.youtube.com/watch?v=6b_OooPn_Mk[/video]
“how far away are they” I say it every time we drive past a field of Shetland ponies near us (and the wife does that roll-y eyes face)
Genuine one liner: Milton Jones.
“The man on crutches wearing camouflage clothing who stole my wallet – you can hide but you can’t run”