I think the dialogue wasn't King's original
Robinson was mad with grief, and his hatred for Dolan occupied his mind. After capturing Dolan in the pit, he spent a lot of time "toying" with him, much too long for someone with vengeance on their mind. He reminded me of the cat who toys with the mouse before killing it. As other posters have noted, I too wonder how the explosives were put under Robinson's wife's car with the cops on stakeout. Witness protection personnel would have removed all traces that would lead to them (their car? ROFLMAO). I like Stephen King, but the screenplay should have been done better.
Mountain Man