Why? He had a taser to play with and apparently no restrictions on its use. After all, those things cost a lot of money. Makes sense to use them every chance you get. Or maybe this is "professionalism" in this police department.
You missed his point. Common sense and professionalism has flown out the window in the Law Enforcement arena. Police used to SETTLE disputes, they didn't HAVE to or FEEL they had arrest people or draw weapons all the time. The taser is becoming an excuse to use such force because it is considered "non-lethal". The result, no common sense anymore.
Maybe the cop should just grab the little fiend. When it turns out the kid bites him and has aids, well gee, I hope the officer is OK.
Oh but the kid is already bleeding. Better not grab him. Then of course there's the always the baton...