# Jumping problem (547091)
**URL:** https://discussions.unity.com/t/jumping-problem-547091/547091
**Category:** Scripting
**Tags:** Scripting
**Created:** [August 15, 2014, 7:40pm UTC](https://discussions.unity.com/t/jumping-problem-547091/547091 "2014-08-15T19:40:09Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@UnityUser\_721](https://discussions.unity.com/u/UnityUser_721)
#### Post date: [August 15, 2014, 7:40pm UTC](https://discussions.unity.com/t/jumping-problem-547091/547091/1 "2014-08-15T19:40:09Z")
I have this script that needs to make the sphere jump:
```csharp
using UnityEngine;
using System.Collections;
public class MoveSphere : MonoBehaviour {
private float MovementSpeed = 2;
private bool isFalling = false;
private float JumpForce = 2;
public GameObject JumpOnOtherThenWall;
void Update()
{
float MoveHorizontal = Input.GetAxis ("Horizontal");
Vector3 Movement = new Vector2(MoveHorizontal, 0.0f);
rigidbody.AddForce(-Movement * MovementSpeed);
//Jump
if(Input.GetKeyDown (KeyCode.Space) && isFalling == false)
{
rigidbody.AddForce(Vector3.up * JumpForce * 100);
}
isFalling = true;
}
//Jump only if on the ground
void OnCollisionStay()
{
if(JumpOnOtherThenWall.name != "Wall")
{
isFalling = false;
}
}
}
```
The problem is that it allows the player to jump even if the player is touching the wall and not the floor, I added the if statement inside the OnCollisionStay() function in order to prevent that but now itโs not jumping at all.
---
### Author:  [@roger0](https://discussions.unity.com/u/roger0)
#### Post date: [August 15, 2014, 10:04pm UTC](https://discussions.unity.com/t/jumping-problem-547091/547091/2 "2014-08-15T22:04:13Z")
I think its because isFalling is being set to false constantly in the update function, and its overriding the OnCollisionStay function.
---
### Author:  [@UnityUser\_721](https://discussions.unity.com/u/UnityUser_721)
#### Post date: [August 15, 2014, 10:15pm UTC](https://discussions.unity.com/t/jumping-problem-547091/547091/3 "2014-08-15T22:15:20Z")
It is set to true not false and the only thing that does the problem is the if in the OnCollisionStay, it worked without it but like I said it was possible to jump on walls ๐