Petr Cech injury v. Reading (video)

Chelsea keeper Petr Cech is injured inside the first 20 seconds of the match with Reading F.C. on Saturday, October 14
http://www.youtube.com/watch?v=jtE6K2a_akM

Should the Reading player been shown the red card? Did he do it on purpose?

I think it was not a booking. Cech was just unlucky that he got injured.