I think grenades that detonate on impact should not have a detonation timer. All grenades will detonate after being in the air for a certain amount of time. Maybe you want to throw an EMP over a wall, but instead it blows up mid-air, not hitting anything. It is supposed to detonate on impact, like a concussion grenade. Sticky grenades also have a detonation timer, I think the timer should begin the moment it sticks to something, not when it leaves your hand. And your character simply chucks the grenade, there is no animation for arming, so it's safe to say this is the future and grenades arm themselves Of course, this would not apply to any grenades that are supposed to have detonation timers, like frags and flashes, or revive/healing grenades. I've never even seen a decoy grenade, I couldn't tell you how it works.
