Another urban myth i’m afraid. I’v been on real espresso/ristretto for years, and sleep well and do not shiver, at all, untill i get my fourth shot ;-) Amities Philippe > Le 8 janv. 2022 à 20:19, Mark Kronquist via LUG <lug at leica-users.org> a écrit : > > Well, Frank, the four double espressos probably cause body jitters.