grandpa texting. >> or me texting without my glasses. >> compared to the younger set that can text withoutw many times have we all done that? >> christian vera dropping the phone. >> all of us with cellphones have definitely come across, we've either done or seen somebody do. >> he's doing the guys, the girls, the younger, the older. he's nailing it. there's so many. >> this is the book, really. this is the entire sign language book of phones. and every time you see one you're like, oh, my gosh, you've done that. it's all there. if you want to see whether you know all of the sign language of cellphones, go to rightthisminute.com, click on "tv show" or use our mobile app. >>> that was fun. catch us next time on an all new "rth." >> investigators says the east area rapist has attacked several teenage girls. >> the 29-year-old wife was raped while her tied-up husband had to listen. >> it's so warm in concord tonight that people have their doors and windows open, but the police are saying to lock up tight. >> every time the east area rapist strikes in a new city, the police switchboard lights