Yeah I have done those. My attitude is if I know i am going to go physical why the preamble.
Because how you get there can matter. One excellent training ever exercise (as ballen mentioned) is to gear up for a nonviolent solution. It's a way for students to see the contact great or marking cartridge stuff and go "PARTY TIME!". That sort of scenario forces them to actually think it through and keep to things that they can justify legally.
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