Originally Posted by Scar Predator
It seems like Rick's training academy skipped the hand-to-hand training. His reaction when that walker grabbed him last night: "UHHHHHHHHHHHHHH!"
The second walker comes along, and his reaction: "AHHHHHHHH!!".
He's fared himself pretty well against walkers in the past, and was killing a few of them from the impact of the revolver in the last episode. He was also pinned against the the gate.I'd choke this up to him not physically and mentally breaking down. I mean, Herschel has stated that Rick hasn't gotten sleep since Lori died, he's most likely not eating or really keeping himself all that hydrated as well. His body is bound to get weaker.
On top of all this, as he was trying to escape from that group of walkers, Martinez made sure to keep Rick back, so he had to retreat right into that same group.