we are also joined by tessa kuhn. she started tha that #i'llridewithyou.weets have been sent. tell us what happened, why you felt the need to start this hash tag. >> i've been working the sydney cbd. thankfully i wasn't working in the city today, but i was watching to see it unfold on social media, as i think most people were. i saw a frightened muslim woman on public transport and that pretty much broke my heart. it just seems like something there should be more of in the world. can't say that i planned this at all. it has been amazing to watch it take off. this is a completely off-the-cuff thing. i've just been so overwhelmed at how many people have picked it up. >> tell us what that act of kindness was. >> there was a woman who observed another woman on a train just silently remove her hijab, and she approached that woman on the station, and simply said put it back on, i'll walk with you. >> so many people have had your reaction, which is it's almost caused people to cry. they're sort of so wanting to get across this message. is that the overwhelming fe