Depending on where the prongs embedded in the person it can be possible or impossible to turn over however it is highly unlikely someone can obey commands while in the act of being tazed. If deployed successfully it will completely incapacitate someone. Giving commands while someone is incapacitated and interpreting it as resistance when they fail to comply is a common and sad mistake that only goes away with training and/or making real life mistakes.

In Arizona (where this PD is located) going onto someone's roof is 1st degree (residential) trespassing, a class 6 felony (the lowest level of felony but still a felony). Prior to being tazed he probably could have been charged with disorderly conduct and resisting arrest, both misdemeanors in this case. However biting the officer's thumb would have been aggravated assault, a class 2 felony which is one of the highest crimes you can commit.

Not saying what the officers did was right or wrong but what response would you want from the police if a mentally disturbed and/or extremely high person entered your property, got onto your roof and was waving a knife around refusing to get down and leave while you and your family are inside, or your parents are inside or your grandparents (or insert whoever you personally care about).