. . . bought something and then wondered what you're actually going to do with it?
Today I bought a camera from a friend for £100. It's got such a good specification that, at that price, I simply couldn't resist a bargain. However I've already got a fairly decent camera and I'm not entirely sure what I'll do with the new one that I couldn't have done with the old one.
Even so, when it comes to thinking "What the bloody hell am I going to do with it now that I've actually bought it?", I'm not even in the same league as someone else who made an impulse buy today!
https://www.bbc.co.uk/news/uk-england-cambridgeshire-51578026
;-)