// Print how many points are colliding this transform
// And print the first point normal that is colliding.
function OnCollisionEnter(other : Collision) {
print("Points colliding: " + other.contacts.Length);
print("First normal of the point that collide: " + other.contacts[0].normal);
}

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
void OnCollisionEnter(Collision other) {
print("Points colliding: " + other.contacts.Length);
print("First normal of the point that collide: " + other.contacts[0].normal);
}
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

def OnCollisionEnter(other as Collision):
print(('Points colliding: ' + other.contacts.Length))
print(('First normal of the point that collide: ' + other.contacts[0].normal))