In Halo 3 grenades have weak vertical damage. What does this fact mean? If timed properly, you can jump over a grenade and avoid most of its damage. Likewise, it means that a well-timed grenade jump won’t even drop your shields all of the way. Learning the proximity of sticky and frag grenade damage is a must, as it will allow you to position yourself just outside of their range and, eventually, give you an instinctual feel about where you have to be to avoid grenade damage. As you come to know the sound of a grenade behind you, you’ll run forward or move to the side without thinking to avoid damage, allowing you to stay alive in hectic battles and contribute that much more to your team.