Recorder chip warning
From Halopedia, the Halo wiki
The Recorder Chip Warning can be found during the cutscene in the 5th level, 343 Guilty Spark. Use both Flycam Program and DevTrainer when the Master Chief is holding the recording chip from Private Jenkin's helmet. Pause the game before Master Chief puts in into his helmet and rotate the view to look at the other side. The chip has the words "DO NOT EAT", a reference to Soffish, another Bungie joke.
