I think my favourite bit is

> A few moments later they were rolling on the floor, and Kla­pau­cius was scream­ing and ges­tic­u­lat­ing in the hand-to-hand style of the famous mas­ter-s­cout Krool, while Trurl, in spite of his defec­tive voice-box, was giv­ing such excel­lent imi­ta­tions of a dingo howl­ing at the ris­ing moon that even the robot­s—who, of course, must be pre­sumed to have a good deal of sym­pa­thy for such prim­i­tive forms of expres­sion—­gave him an ova­tion.