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Peter Parker is there! And he brought one of those Ice Cream Bicycles which he built himself. It's filled with plastic containers housing his homemade cannoli, in various flavors, alongside a few boxes of popsicles, and other frozen treats. He'll be giving them out to whoever asks!
He brought his web-shooters, at one point he'll almost definitely make himself a web-net hammock to take a nap, and he also thought that bringing his web-shooters would be a good idea in case someone got stuck or hurt. If anyone needs an umbrella to get out of the sun, or also wants a hammock, Peter will make them for you.
While not swimming, jumping, handing out treats or napping, he'll probably also spend a lot of time crawling around the exposed rock cliff exploring, because he's very sticky.