>> becca casterly goes by bec boop on all of her social media. she has a ton of followers. >> sorry if the picture is not perfect. >> every morning on her way to work she logs into periscope, and she does what she calls coffee scope. she's talking to all of her followers. she does this every day? >> yes. she checks in with her followers dail they check in. she responds. they talk about different things. those hearts on thcarts on moving. >> what happened? >> suddenly the video goes haywire. >> you can hear her scream. >> you did hear her scream. the video goes black. suddenly you start to see the people interacting with her typing, hey, what's going on? are you okay? >> something attacked her or hit her, and now you can hear -- it's almost like walking. can you hear the rubbing on the about uniform is the only thing i caught. [ horn ] >> oh. >> you heard a horn. again, the comments continue to go. >> with that follower that thinks her phone was stolen. >> pick up, right? >> yeah. >> that follower was on to something. apparently as she was going l