This is what happened on 9th November, 2013, at TianAnMen Square, Beijing.
An old man in wheelchair tried to spread leaflets on the square.
He spread around one hundred of leaflets in the air and they fell on the ground.
I didn't see his face nor the leaflets.
People noticed this and gathered in crowds, there was noise everywhere.
There were immediately a bunch of plain-clothes men coming from the crowds,
picking up all of the leaflets in a minute.
There was nothing left on the ground.
they arrested the man and took him into a big police van.
Then I noticed the man could walk himself.
One of the police noticed that I took pictures with my phone, came to me and ask me rudely to delete them.
I deleted some but there were still four photos left.
I post these photos with description on Weibo.
My post got censored and deleted in some minutes.