To me the wording in throw 123 R&G and Sacrifice throw 125 R&G seems fairly clear.
You do damage equal to net hits, stun unless your unarmed attack do physical as generally the case with unarmed attacks, soaked as normal. To me the interrupt things is whatever, the option exists but I doubt it will be done often. In general it's simple action clinch, simple action throw. The issue being it can be seriously hard, Str+Body can be a big number if your trying to toss a troll, so having sacrifice throw as a backup is handy.