If you read the other articles linked to, you will find that the taser was in drive or stune mode, not full mode. He would have been able to comply with the order to stand and not been physically incapacitated.
"lol, I'd like to see you stand up after you have been tased. Thats like convicting someone of failure to breath after they have drowned."
Drowning and being tazed is not a solid comparison. Being tazed generally results in momentary loss of muscle control and a fair amount of pain. Drowning usually results in death.
Standing after being tazed is not really that unrealistic especially when the cops were trying to pull him up.