Recently, after a water aerobic excerise class (90 minutes) (my first time ever) after my shower, I experienced whole body tingling at first then hand cramped up and I could not open them, wanted to call 911 but I was naked after shower so I put on clothes (underwear) which took forever and ran down to door to open it, so they didnt have to break down but luckily auto spoke to text my neighbor she found me on floor and gave me juice & oreo then I just threw up water....which i was drinking at class. BTW I live in AZ, would this be heat exhaustion or something else? Has not happened since, but I have not exerted myself