"shrugging his shoulders, bending his arms, flexing and putting his knuckles together near his stomach"
Thats a bit more than "tensing"
I dont think you can call it a "standard", it all depends on the situation. If Taupe was using the same body motions to stretch before his day of skiing it would not be considered a problem. The same body motions used when he was being arrested could be considered combative, aggressive, uncooperative, ect.
Good Luck, Tony