Stuck Zip

My default setting is to shove things in the freezer overnight and try again when they have thawed out next day.

I don't know if it will work, but it is easier than unpicking it!

Have you tried turning it inside out to see if a little of the fabric is caught in the teeth of the zip?
Sometimes, possibly with the aid of a needle or something small but blunt, it is possible to work the fabric out, one tooth at a time.
How do I know?
I have a coat, which I wear almost all the time, and the inner wind flap gets into the zip, unless the zip is pulled outwards as it is pulled up.
Whatever you do, DON'T force it!
HTH

Silver linings and all that

.....haven't......

But you haven's been bored!

He was wearing it for about an hour before we managed to get him out of it - there was a lot of giggling and grumping and groaning - I dread to think what the neighbours heard lol . Brute force has got me nowhere! I’ve tried fairy to no avail. Will try a few more remedies tomorrow and if all else fails I think I might have to unpick the stitching and replace the zip. It’s been one heck of a day! Thanks again folks

Is it possible to pull it upwards just a fraction more and it might just get it to bite?

If all else has failed to get a start on it I would now go for the tried and tested brute force method.

Is he wearing it?
If so it’s been hot today, poor thing.

Run a lead pencil up and down the zip.

None of the fabric is stuck and the teeth of the zip seem to be aligned so it hasn’t gone off the track. It’s baffling! And was a production trying to get him out of the bloody thing without causing him any physical harm . Thanks for the suggestions I will finish my cuppa and have another go at it.

Hope the poor man’s not still
in it by the way....

WD 40 tiny amount using the red straw attachment or graphite powder.

Is any of the coat’s fabric caught in it, either inside or out? If so, you should be able to pull it free little by little.
Failing that - candle wax? Little bit of washing up liquid? Soap?
Good luck!