herecomes thank you for that. Its one of those MN phrases that I saw often but couldnt quite understand 
Oh yes corvax the buggy of doom. One hand removed, one bag badly balanced and whooooooosh your precious child flies backwards at the speed of light.
Mine got quite used to it and used to wait patiently, staring at the sky, until I picked them up.
You can buy 'tip me nots' which are like those wrist weights. You put them on the wheels to stop the buggy falling backwards.
I thought well yes good for that but wont they make the buggy even heavier to push?
I only have to drive past Holloway Prison to be flung back( like my children in their buggy) to those far off days of hunched pushing up the hill.
Maybe, just maybe it is because we remember how much harder it was without P&C spaces, buses that take unfolded buggies, special trollies, changing rooms etc that we appreciate them just that bit more?
I think they are good things and I am glad that parents of our generation (dare i say) made a big enough fuss for them to be introduced. But to be honest I am a bit emabarressed by the whole thing now.
If you think the threads on MNs are bad you want to have a quick google and see what you come up with on other parenting forums.
Would make your hair curl.