Well someone must have read my Tyson blog, because this video was just released August 23. It gives an accurate account of what happens in a beef packing plant. This video is very similar to what we saw at Tyson, although we did not see the animals "knocked". We did see more of the fabrication of the carcass than what this video shows, however. Whether you eat meat or not, please take time to watch this video. It might clear up some misconceptions you have about the process, particularly if the only clips you have seen are undercover video shot by someone with an ax to grind.
