While Christophers shack was raided 

I changed the "While Christophers shack was raided, Wikus discovers and removes the container... etc" line to "While raiding the shack of the alien that was helping Christopher, Wikus discovers and removes the container, accidentally spraying some of the liquid onto his face and his left forearm is injured by one of the aliens." because Wikus did not find the container at Christopher's house, it was at his lab partner's house... Have no idea the name of his lab partner though.  That paragraph needs work in general though, because before that sentance it also states that Christopher resisted, which he didn't, he hid at the side of the building and told his lab partner to be nice, but the lab partner was not and got killed.