Sentence:  The car in which I had taken Olivia to dinner and then out to the cemetery — a historic vehicle, even a monument of sorts, in the history of fellatio's advent onto the Winesburg campus in the second half of the twentieth century — went <WSD>careening</WSD> off to the side and turned end-over-end down Lower Main until it exploded in flames... 
Meaning of the word marked with <WSD> tags:  To move swiftly and in an uncontrolled way.