I take this flight fairly frequently (last time was 19 March). I used to be a very nervous flyer and I really do watch the safety brief every single time etc etc.
I'm trying to think what I would have done on that flight - my handbag and laptop bag were under the seat in front of me (nothing in the bins). I can't exclude that I wouldn't have taken my handbag (probably acting on "automatic pilot"). I think I almost certainly would not have taken the laptop.
For me, stopping to get stuff out of the bins would be unthinkable, and I suspect I'd have shouted at someone who did.
But I suspect I'd be guilty of taking the handbag and consequently wouldn't have both hands free going down the slide (a good point raised by someone earlier).