" ...causing an inrush of freezing air, along with a howling sound......."

Should I believe the witnesses or the internet experts?

Maybe a few internet experts... How can the air rush in ??? the atmosphere inside the plane is at far higher pressure.. the sound would be from air escaping not from air rushing in.

cold air might get sucked into the cabin from an area on the plane were the temp is not regulated giving the impression it's coming from outside making the cabin very cold

As already said in such a case the air would indeed leak out of the aircraft causing immediate and dangerous decompression, plus oxygen masks dropping down to passengers. The plane would of course been piloted to a lower safer level to limit any further damage to life and limb and no doubt aircraft too, seems as if there were no problems nor actions of this type so as said possibly a ruptured door seal or a psychosomatic experience.

Interesting to note the mention of that esteemed organ of the U.K. fourth estate, ''The Daily Mail'' otherwise known as the ''Daily Wail.'' The editors do have a romantic sense of drama in their makeup which at times does seem to run riot.

An urban legend in the making ?

The door was not open,there was only air leakage,not very big - because air pressure in the cabin did not drop.Air pressure in cabin is maintained by quite powerful air pumps.We - passengers - we are breathing while sitting inside,letting out quite a bit of CO2 from our lungs.Cabin needs fresh air which is supplied from outside.

" ...causing an inrush of freezing air, along with a howling sound......."

Should I believe the witnesses or the internet experts?

Did you interview the witnesses or are you taking their "reported" testimony as fact? Actually the Internet experts in this case are indeed correct IMO. Any opening of a door at altitude which would allow air from outside the aircraft into the aircraft, then the aircraft would have to have had experienced a decompression of the cabin first. Nothing in the reported witness testimony alights to this fact such as oxygen masks, plane descending to an altitude with enough oxygen to allow humans to breath, followed by an emergency landing etc.