.He was wedged in with his head in one hole a foot in another and one wing caught tight in another and his other wing was out and caught in vine.I tied up dog about 5 meters away and spent the next 20 minutes trying to free the stupid creature who had a bite like a clamp and claws like godzilla!! oh yes and seemed to want me dead,.I finally got him free only to realise that he could not get up as there was only about 4 inches between the wood fence and the chain wire ,so then had to ,with help from a very scared cyclist get him up by the legs bit by bit through the wire to the top about 6 feet
After we both sat for a while he made it up into a tree thank goodness so was OK(magpie not cyclist he had taken off)
I imagine with antiseptic my cuts may not turn to Magpie-itis or something and my bruises will fade..
cause of it all in my guess??? about 2 inches in front of fence was a really big button spider ,you know those big orb weavers you see at night ,poor old magpie I think he may have thought he would grab it and spider had his revenge
I have never thought those wire fences could be dangerous!!
The good Lord only knows what was going on behind that fence the night before for it to be in that condition!!!!!!!!!!!! 
The "Morning Glory" to which our fellow bird fancier was refering is a noxious weed vine with large purple/blue flowers. (GOOGLE IT) Nothing too biologically hazardous I'm afraid! 
Hoping that this clears up any confusion 
I didn't click until your post Tintola 
..iv only ever heard of the vine!!!..just that idea I had to run and wash my hands!!
Oh well at least you kept your shirt on, wouldn't want to startle the neighbors. 
character.