to hate that ad with the couple looking in a jeweler's shop at engagement rings and the girl wants an expensive one and the boy looks a bit troubled then an airbag goes WHOOSH in front of his body ...

[hambler]

and he semi happily / resigned ambles into the shop to cough up for the big ring he can't afford?

I thought he could afford it 'cos he'd saved up. Have I got the wrong end of the stick?

Yes he saved with the bank doing the ad.
But he looks sick as a pig