HOW TO MAKE A PRIVATE PHONE CALL!

ACTOR LIONEL BARRYMORE AND ANOTHER ACTOR I DO NOT RECOGNIZE WITH THOMPSON, EXCHANGE SNEERS.   ANYONE KNOW THE MOVIE?   NOTICE THE BLANK ADAPTOR ATTACHED TO THE BARREL.   IF I WAS BARRYMORE, I WOULD RUSH THE GUY WITH THE THOMPSON.   HE WILL HAVE A TOUGH TIME SHOOTING WITH THE ACTUATOR FORWARD.