Looks like walker is correct about the play wanting to go inside of Parnell but because of the backside pursuit Murray tries to bounce outside. Problem is, like fuzzy said, Parnell is manhandled and play ends for no gain.
Thanks for posting the Gif. My goal is to get people to debate the actual plays regardless of whether they agree with me. Actually, it's better if people don't agree, otherwise there is no debate.
1. This is the play where
Collinsworth said that Murray ran into Parnell because Parnell got pushed back.
That much is definitely wrong. The idea is for Parnell to take #72 up as far as possible which means the more Parnell and #72 go backwards and towards the outside the better because Murray is expected to run inside. It is a reach block, which means that Parnell is trying to take a defender that was lined up inside of him and get him to the outside.
2. The play was dead because of #50, not because of Parnell's man. The idea in that play is for Martin to block #50 but Martin was barely able to walk between plays and was late a few times after he injured his leg.
3. It was either #91 or #50 that forced Murray to start to bounce outside and into Parnell.
4. If you view the broadcast angle in slow motion, you can see that Parnell fell because Murray's legs were intertwined with Parnell's. It's difficult to know if #72 could get back to the inside without Parnell falling and if #50 was blocked.
5. Tyron was supposed to block #91 (Cox) but Cox is very quick and Tyron didn't even touch him. This is where the Cowboys predictability works against them, IMO. Murray is the RB with Romo under center which makes is about a 99% probability that it is a run. The Eagles jump in the direction of the run as soon as Romo turns that direction for the hand-off.
Summary: This play is a great example of how broadcasters say something that is wrong and people believe them. Parnell and #72 were in the way of Murray running outside because the play was designed to go inside.