"[Appel's painting] 'Hip, Hip, Hourra!' (1949) is one of the finest works he produced in this period. The figures stand out from the black background surface.. ..in a lively movement and colouring I would go so far as to call sumptuous.. ..'Hip, Hip, Hourra!' is as flat as a kaleidoscope. It is a coloured drawing on black, a dark box with colours stuck on like butterflies in a glass case.. ..[Fuchs compares it with a slightly later painting 'Volons ensemble']: This work is definitely not a set of figures that have settled quietly in a painting; what we have is a confusion of more or less figurative movement: a composition without quietude. In 'Volons ensemble' Appel created in 1950 the model for a structure that would be fundamental for the rest of his oeuvre."