Quote from Patrick in The Incident
David: What is that noise? Patrick: I don't know. Maybe the sheets are a bit stiff. David: No, it's like a, a crinkling sound. Patrick: Oh, you're probably just sitting on the mattress tag. David: [gasps] Is this a mattress protector? Patrick: No. No, no, that's a... a second sheet that you put on the mattress, um, that my mom gave me when I moved in, so I just... David: You put down a plastic sheet? Patrick: Well, I don't think it's a pla... I mean, it might have like a rubberized coating, but I don't know. David: Oh my God! Patrick: Purely coincidental.