Matt pulls his car off the road, pulls a lever resulting in a large inflatable tent. He unzips the flap and looking inside there's a circular bed, bedside table and fridge. He ushers Sheila in and follows. The inflatable items are now solid and in addition there are 2 chairs and there's a radio on the table. Cut to when they're in bed, which is now against one of the walls, they
have proper pillows and the gold coloured cover is now a green blanket- when it was earlier seen in the car boot it was black or dark blue and by freeze framing it can be seen that thee are now magazines, a phone and a camera on the table.
Throughout the entire film you can see the wires that are used to lift things and people up whenever the "anti-gravity ray" is used. This is especially obvious in the scenes where the saucer is brought down to the jungle and when Matt rescues Sheila from the runaway train wagon.