Maybe the best college summer job story I've got happened after my sophomore year. I "interned" for Arco Oil & Gas out of their Venice, LA shore base. The Mississippi River was super flooded that year and I couldn't even drive my little Toyota truck out there because all the roads were flooded over with a couple of feet of water. They told me to stop at the grocery store at the end of town and call and they'd come get me. When I did, they showed up in a 4 wheel drive Suburban and loaded my truck onto a flatbed trailer they had in tow. About two miles later they pulled into the parking lot of the shore base which fortunately had been built up a few feet and unload me. My landlocked, Texas eyes were a bit wide at that point. I think it may have been the first island I had ever been on - such as it was.
Anyway, among the many things they let me so was ride out in the airboat one day when they went to maintain one of the pipelines which mainly meant getting to one of the small platforms out in the marsh and watching the guy who knew what he was doing take a few measurements and then lube a few things.
All was good until we got to one that was surrounded by water hyacinths as far as the eye could see. We slid in just fine, but when it came time to leave, the hyacinths kept the boat from being able to get going. The boat pilot revved the engine, rocked back and forth, and we went no where. After a few minutes I started to get concerned, but no where near as concerned as when he said, "Get out and clear those hyacinths and make me a path. I'll take care off down it, whip around and you can dive back in as I come by."
I thought, "this dude must be kidding. There are alligators and water moccasins out there and no telling how deep that water is, and these steel toe boots are gonna sink in the mud even if there is a bottom."
But when the tech jumped out and the boat pilot just glared at me, I slid my big old butt over the side as gently as I could, found some footing and got to work.
Looking back the biggest danger was probably me talking myself into a panic. I imagine those old boys knew that water and knew there wasn't anything to worry about. But you couldn't have convinced me of that for anything in the world at that point.
If anyone had mentioned shark, or gator, or snake, I'd have likely had a heart attack and not lived to tell the tale whether there was one or not.