My 8 year old DS watched Gremlins and is now scared to sleep in his own bed

[ChocoMarmalade]

My 8 year old son watched Gremlins on a flight home on Saturday. It was in the kids section of the flight entertainment and I remember it as a Christmas comedy movie - I had forgotten that it had horror elements. He is now having nightmares and refusing to sleep in his own bed for 3 nights in a row.
I have explained that the Gremlin is a puppet and not real but he keeps visualising the bit where the Gremlin eats someone and can't get it out of his head.
I had put age settings and parental blocks on everything at home and feel terrible that I let him watch a scary film on the plane. What can I do? I need to get him back sleeping comfortably in his own bed before school starts.

Build a bear sell these now. Maybe get him the cute Gizmo version? My dd is 34 and still can't watch Edward Scissorhands!!

Perhaps you can YOUTUBE some behind the scenes footage of how they do the special affects for it.

I accidentally let my nine year old son watch The Hunger Games, so sympathise. I am sure he will forget about it, but the YouTube behind the scenes idea is a great idea.

Thanks for all the suggestions. I had an IT guy block YouTube from all our laptops last year and not sure how to unblock it now but I will try to find some behind the scenes explanations so he can rationalise that what he saw isn't real.

I am in my 50's and I still get nightmares from Gremlins. I only saw the trailer when it came out in the cinema. He has my sympathy. Possibly get him a guard bear to "protect" him.