Nightwing was Training. Arsenal was...multitasking.
Normally Nightwing would have dodged it or caught it or something, but he wasn't expecting it. He wasn't even on the shooting range. All he knew was that one minute he was doing a double layout off the vault in the pike position and suddenly THWONNNGGG!
A Candlelight Vigil has been organized outside Titans' Tower at midnight.
Donations for the "Save Nightwings Tush Fund" along with Get Well gifts such as bundt cakes, balloons, and stuffed animals should be sent to the Tower as well.