A few years back for fun, I learned to say the alphabet backwards as quickly as I could. I used basically the same technique I use as a musician to learn complex phrases; start with a short sequence (like "z y x w") and repeat it over as slowly as you need, and increase the speed as you get better at it, then either extend it a few more letters (e.g. "z y x w v u t") using the same strategy or learn the sequence starting with the next letter separately ("v u t s r q") and then "glue" them together when you're proficient with both. It took me only a few minutes of practice to get the whole alphabet this way, and it's stuck fairly well despite not really ever practicing it other than to occasionally show people as a party trick. Strangely, the letters seem to work better in that order for me; I can actually say the alphabet faster backwards rather than forwards, although it's hard for me to to tell if that's actually due to the sounds blending better objectively or due to the fact that I tend to have a bit of trouble with enunciating clearly in general and the "backwards" route skipping some learned bad habits that the forwards route uses.
Since I don't drink any alcohol and don't drive, I can't imagine I'd ever have a chance to use this in a field sobriety test, but I also suspect that a cop who pulled me over wouldn't find it particularly amusing, so I wouldn't be eager to try it anyways.
Since I don't drink any alcohol and don't drive, I can't imagine I'd ever have a chance to use this in a field sobriety test, but I also suspect that a cop who pulled me over wouldn't find it particularly amusing, so I wouldn't be eager to try it anyways.