~post deleted for privacy~ I will report back on the experiment, however.
It's still the sugar equivalent of having a small cup of tea/coffee/water, and stirring in 4 sugars. If chugged down quickly, that's quite a hit! Even if not, it's still more sugar rich than most things you'll intake in your day-to-day.
Your experience may well be due in part or whole to taurine, I can't say. But parents of young children everywhere can attest to the effect of one overly sugary serving resulting in quite a bit of resultant hyperactivity and mood change over the following hours. So your experiments may benefit from some controls in that respect.