The buzz is in the roast. 'Medium Roast Fancy Grade Ben Shan Oolong of Anxi' from Yunnan Sourcing.

I've had some really good Ben Shan Oolongs, but nothing this roasted and it has to account for the flushing in my cheeks, the buzzing in my head, the all over warmth and feeling of contentment that settles over me when I drink this tea. Yunnan Sourcing has some amazing things to offer us and this is one of them. If they are out of this particular tea( I checked for you, they are) you will still love their lightly roasted Ben Shan which is still available.
'Ben-Shan' is a trigger word for me for a tea is going to be worth paying attention to. Along with the words 'Anxi' and 'Fujian' I am most certainly clearing my palate, my tea table and my mind while prepping some fresh boiling water. This tea goes through all kinds of delightful changes. The tea in the bag smells woodsy and nutty. Steaming in the warmed dry cup it is heavily floral and the steeps themselves are both of those with deep roasted notes to boot. It's goddamned beautiful is what it is.

See for yourselves! Steep two and just getting started!