I'm having an Emergen-C

One of the undergrads in my lab has been pushing me to try this Emergen-C for the last week. Emergen-C is this nutritional supplement that you gives you some nutrients and 10 times the recommended daily dosage of Vitamin C.

So I finally tried some Emergen-C, mixed with my gatorade. I can only describe the feeling afterward as buzzed. But not like a beer buzz. Closer to a caffeine buzz. But not quite. My muscles definitley felt kind of tingly, but I don't think I really felt energized. Just like something was off. Anyone else encounter this stuff?