Front Bumper - low speed - damage

Does anyone have knowledge of how much damage I should expect for the front bumper on a 2005 Tacoma in a low speed (< 5 mph impact). I left my truck in neutral and forgot to put the emergency brake on while visiting a store. When I returned to the parking lot my trucks had rolled ~50 feet and hit a Nissan Pathfinder (a bit of offset but essentially lined up). I backed my truck up, inspected the Pathfinder and found no damage. I waited for the owner of the Pathfinder to return and he agreed there was no damage and left. At the time I think I was thankful I didn't cause any damage to the other vehicle and am not certain how well I inspected my truck. But this morning I noticed significant damage to the front-end (light pushed in, brackets broke, big dents in bumper). There is also damage on both sides which is puzzling. Just wondering if any of you guys have experience with low impact collisions and can verify how much damage was caused. I have attached a few pictures. Thanks~