Voll im Saft comes from Stromberg, the German mockumentary comedy centred on Bernd Stromberg, the overconfident deputy head of the fictional Capitol insurance company. The show built its humour around Stromberg's self-image, and short spoken lines like this one travelled well beyond the episodes as fans quoted them in chats, edits and reaction videos. The phrase works because it sounds like a proud status update, so it still fits modern clips about energy, readiness and ironic confidence long after the series ended.