Yeah, something like that would definitley sharpen up your attention to boat traffic. I applaud your quick reactions and self preservation. Glad it turned out good for you.
We have a lot of ship traffic on the Columbia River and these things are silent monsters, so it pays to have a good swivel-neck when you're near the channel. I've learned to also be aware of the waves they leave behind. They could ruin your day if you get caught in shallow water when they arrive.