Regardless of any slope in the tunnel, eventually you will reach a point where you can't move forward, so could we maybe start using our brains in situations like this and just stop and wait instead of trying to push the people in front of us(who are presumably stopped for a reason) forward?
I'm not sure you understand what happens in a crowd crush scenario.
This is what happened and is not disputed.
1. A gate was opened to a finite amount of area.
2. People who were waiting outside ran in.
3. They stropped when they reached the front.
4. The people at the front now know how much space there is.
5. The 1000+ people at the back are not aware. They either run or slowly push forward.
6. The people who are now coming in are still not aware there is only a little space left.
7. They are nudging or encouraging the people ahead of them to me.
8. The people who were at the front can not move and are yelling out to the people pushing they can't go any further.
9. The people at the back can't hear them.
10. The people at the front are now starting to be crushed by the people moving from behind. They can't move out of the way. Their screams are not heard by the people in the back.
11. The people in the middle are now starting to be crushed.
12. The fans around the stadium, the players and the authorities are aware of what is happening. They are trying to tell the people at the back to stop moving forward.
13. The people at the back stop moving forward when they find out there is no more room. During this time hundreds have been injured and 96 were killed.
Some may have pushed. The majority didn't. They just thought they were going into an empty area to watch a football match. Most had no idea they were causing the death of others just by moving forward a few paces.
You've got to imagine this like water pressure. The pressure doesn't stop because the water can't move forward, it just gets more and more intense. People had no idea what was happening. All the knew was that the authorities had opened a gate to let them in. They could only assume that there was enough space.