S10E11: The Blind Side
PETER: Fuck! Fuck! Fucking cock! Fuck! Fuck! Fuck!
Lois, what the hell?
Oh, my God, Peter, are you okay?
What the hell happened to the stairs? They're all slippery now!
I had them replaced, remember?
The old ones were so rough, and Stewie got that splinter,
so I thought replacing the wood was the best way to go.