- “There's something strange about that 'Sop' sign....”
- ―EPA worker 1
- “Look, we can't keep stopping at every "sop", "yeld", or "one vay" sign.”
- ―EPA worker 2
The SOP Sign is a sign that Homer made to distract the EPA workers with to save the family with a wrecking ball, but it turned out Homer failed to knock the truck down.