That would be stretching credibility. If his blood and guts are walker then he would be too. There's clearly a process of transformation regarding the dormant virus and the active virus. The camouflage theory would be too ridiculous to contemplate. At this point, all theories that keep Glenn alive are pretty ridiculous.
Best case scenario, the walkers are too jam-packed into the alley to be able to move down to get their mouths close enough to Glenn giving him enough time to get under the dumpster.
Even that is a zombie straw breaking the credibility camel's back though.
Best case scenario, the walkers are too jam-packed into the alley to be able to move down to get their mouths close enough to Glenn giving him enough time to get under the dumpster.
Even that is a zombie straw breaking the credibility camel's back though.