it means doing a wee up your wall in your sleep
No, the compressions found on the slinky will be different before and after hitting the wall. Before hitting the wall, the compressions will be moving towards the wall. After hitting the wall, the compressions will be reflected back towards the source of the disturbance.
It's just a dream so it doesn't really mean anything.
It means there's no communication. An invisible wall ("muro invisivel") between two people means that they are not talking between themselves ("talking" being not an act but pure non-understanding).
my car hitting a broken wall on the road next door
The Invisible Wall - 1947 was released on: USA: 15 October 1947
You will lose something minor/major. (an object, person, friend or etc...)
jump at a wall then jump again after hitting the wall
The Invisible Wall - 1947 is rated/received certificates of: USA:Approved (PCA #12541, General Audience)
Hitting the Wall - 2011 was released on: USA: 7 April 2011 (Houston Worldfestival)
The cast of The Wall Invisible - 1918 includes: Wanda Hawley Shirley Mason Matt Moore
The car hitting the stone wall will have the greater change in momentum, as the stone wall exerts a larger force on the car due to its rigidity compared to the softer haystack. The change in momentum is determined by the force applied over time, which is greater in the case of hitting the stone wall.