STIR one shot of tequila with three ice cubes (dry to the touch frozen ice, not wet ice) in a glass. Add sugar syrup and Angostura bitters and two more ice cubes. STIR some more and add another two ice cubes and the rest of the tequila. STIR some more, and if you have room, add more ice.
Orange zest twist
A hint of agave syrup sweetness knocks and dilution from the stirred ice knock back the spirit's fire while opening and releasing flavours.