"Henry", however, calls the hatch a "joke", saying that during the lockdown, he never entered the numbers into the computer or pushed the button; he simply stood there, and watched the timer's numbers turn to red hieroglyphs before they reset back on their own. Locke, however, replies that Henry is lying, but he replies that he's "done lying".
The speaker portrays the hatch as a "joke" by Henry, who maintains he didn't engage with it during the lockdown. Conversely, Locke disputes this claim, and Henry subsequently acknowledges his dishonesty.