Thank you for that information.
You not serious right?
OBVIOUSLY there is less time taken to drop and cover something with your body then there is to pick it up and throw it. Try it yourself.
Drop a baseball behind you or a body length away. Drop and cover it. About 1-2 seconds max. Stoop and pick it up and throw it. At least 5 seconds unless it lands almost in your lap.
You obviously were not Combat Arms if you think it takes less time to drop and cover a grenade then it does to pick it up and throw it.