Thresher handling advice?

[carbonbass]

Whether keeping or letting go a thresher, what is the safest way to make sure you dont either get knocked out cold, roll your yak, or get bitten by these angry fish? Does anyone have key tips that have helped them in times of pressure? I mean i know you shouldnt try to handle it until its no longer green but it seems that they have spurts of energy even after they are seemingly dead tired