Lets see what the options were:
Talk him down: Nope, he was throwing large objects, and taunting police. At that point the child wasn't listening. He's using weapons, and the prior talk down didn't leave a lasting impression.
Wrestle with him: Break a bone by accident. Yeah that would look real good.
Taser: Yeah... high voltage, and two prong holes in him... Bad idea.
Pepper spray: redness, swelling, burning, but unless he was allergic, no permanent damage, and they already had paramedics on scene.
Sounds like a perfect kid for the "SIT DOWN AND SHUT UP!" parenting technique.
"I would rather be exposed to the inconveniences attending too much liberty than to those attending too small a degree of it." Thomas Jefferson