SRL for [snakes]: A squiggly line [snakes] across a video screen , gyrating erratically as subjects with hand - held computers register their second - by - second reactions to a speaker 's remarks .
ARG-0: A squiggly line | ARG-1: across a video screen | ARG-M-ADV: gyrating erratically as subjects with hand - held computers register their second - by - second reactions to a speaker 's remarks