I just got my first review on Talentville and was ripped to shreds for my use of present participles: "Waving her arms, she runs toward the police car." Although the reviewer mistakenly calls the sentence past tense, I remember reading (somewhere at some point) negative comments on the use of -ing forms. My reviewer would have had me say: "She waves her arms and runs toward the police car." The two sentences appear to me to have slightly different meanings and implications. Are present participles to be avoided in screenwriting?