A "shark" attack

Running back and forth through the water was fun and all, but wading through waist-high water was wearing you out quick! The ladies you were chasing didn't seem to be having the same problem; maybe they were more fit than you were, or maybe it was that they weren't the ones who risked a blast of super-soaking salt water down their throat if they stopped to take a breath. Even the guilty part of your brain that had kept your eyes glued to the girl's bouncing figures as they ran was losing steam as your lungs and legs commanded more of your attention. As you flagged behind them, you held up your hands to make a T shape, and called out after them.

"Time out! Just... gimme a second!" The girls were a little farther away at this point, thankfully out of spray range, as demonstrated by the ever-considerate Amy who merely managed to land a couple droplets on your arm. Chris shouldered her weapon, and started talking to Lex, while Amy reloaded, giving you a grin that told you she was going to start coming after you if you didn't hurry up and keep chasing her. You let out a short breath, either a chuckle or a sigh, it was hard to tell between deep breaths, but you realized that neither of you were about to go the direction you intended to: Chris glanced up and gasped, Lex turning her head in kind to get a perfect angle of the freak wave that had suddenly reared up ahead of you. Well, in reality, it was probably pretty easy to see coming, considering everyone else who seemed to have braced for it just fine. The four of you, however? Completely taken aback, you were bowled over and dragged under by the crashing wave, with just enough time and self-awareness to take a single gulp of air.

Even through the daze, your already stinging eyes shut against the deluge, you feel something brushing against your leg, and a tingle runs up your already chilled spine, time slowing as you realize what it is, unmistakably: a pair of hands, one wrapping its fingers around your leg to hold it steady, while the other shot forward to grab a handful of your trunks. You panicked, kicking out, but it was too late; all that running before had undone your drawstring, and all these hands had to do was let go of your leg, and the wave carried you right out of your suit.

Your head breached the water, and you slammed your lower half down to keep it underneath, scraping your bare ass against the sand. You'd been pushed closer to the shore- not so much that your cock would be above the water if you stood, but enough that people'd be able to tell looking at you that there wasn't anything else covering it if you did. Your mind was racing, you couldn't tell where the girls had surfaced yet- had it been one of them who'd taken your trunks? Was it just an accident as they scrambled to right themselves, or did they strip you on purpose? Chris and Amy liked to fool around, sure, but they wouldn't do that here, would they? Especially while Lex had her camera-- the camera. One hand shot forward to cover your crotch, subtlety be damned; where was Lex? Was she recording you right now? You glanced around the beach looking for answers, witnesses, a way out-- anything to tell you why you were naked right now, and hopefully to tell you that you wouldn't be much longer.