Can I jump?

// Invoking Unground sets grounded to false
// CancelInvoke stops it from happening
// First I set in motion the Invoke, then I go through all contact points and check
// If any of them is at a 45 degree angle or less, if so I cancel the invoke

void OnCollisionStay(Collision col) {
        Invoke("Unground", 0.1f);
        foreach (ContactPoint contact in col.contacts) {
            if (Vector3.Angle(contact.normal, Vector3.up) < 45) {
                CancelInvoke("Unground");
                grounded = true;
                Invoke("FrictionOn", 0.2f);
            }
        }
    }