I just played through Portal 2 a couple of weeks ago, for nostalgia’s sake.

“Those of you who volunteered to be injected with praying mantis DNA, I’ve got some good news and some bad news. Bad news is, we’re postponing those tests indefinitely. Good news is, we’ve got a much better test for you: fighting an army of mantis men! Pick up a rifle and follow the yellow line. You’ll know when the test starts.”