Theory Usopp will eat Kuma's Pawfruit

look at the picture, clearly Zoro & Sanji is swimming without any problems, & they are helping Brook & Robin, because Brook & Robin can't swim. the only one whose clearly having problems here is Usopp.
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Nami doesn't appear clearly in the frame, but she seems to be fine
But I don't know. I don't think Usopp would eat a DF all of sudden without Oda letting the readers know.