You can teach Ikkyo very quickly if you want. It'd be easy to teach it quickly to an actor so it looked smooth if he had a cooperative uke.
A friend of mine worked in a mental hospital for a summer once, and numerous times employed Ikkyo when attacked by violent patients. (I know because he showed me..) Learning to do this certainly didn't entail any lengthy study.
Maybe he does do aikido, but you'd want a bit more than what you've got to go on..
andrew
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