- Simplified the mechanisms by using "grenade_bounce" event function, thanks to Nescius for the guide.

- Added the napalm mechanisms on objects other than zombies again after fixing the bug. Now, objects other than zombies can trigger napalm only on direct hit.

- Changed the napalm mechanisms so it would only be triggered on zombies. Previously, the trigger on objects other than zombies could cause some false detections & trigger napalm at unexpected locations. So, for now, that trigger is removed & napalm will only be triggered when there's zombie nearby.

- Reduced the "Auto Explode" radius from 150 to 100.