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At the Free Party where Enif and other Pets harass Riki and he punches Enif out. Enif's owner comes to complain to Iason but Iason gives the guy a tongue lashing and defends Riki. Riki was awesome for how he stood up for himself and Iason equally awesome for letting the smug guy know Riki was in the right if a bit violent.
In the old OVA with Riki's Big Entrance using Bike Fu against the police and saves his old gang by himself.