A friend of mine didn't snort it, but he took double his dose (600mg) and drank about 4 redbulls. I was at work with him when it happened. It was at a juice bottling plant and you have to duck under a lot of the equipment on the line. He went under one of the lines and had a seizure. He hit his head when he came back up and it really messed him up bad.
Still takes Wellbutrin but no longer drinks RedBulls.