People
Would have been fun if dad checked for rocks before he layed it down! “Slip n’ Bleed from the anus” they shoulda called this ride.
— Dane Cook

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker turns an unpleasant ride into a crude joke, blaming rocks left beneath it and inventing a gruesome replacement name. The humour exaggerates the consequences of poor preparation: what should have been harmless fun becomes something you wince at imagining.
Context reviewed