[3] Tom is a famous singer announced as "Signor Thomasino Catti-Cazzaza Baritone", who will perform at a concert to sing "Largo al factotum" from The Barber of Seville.
Enraged, Jerry uses a hammer to pound a floorboard, shooting Tom out of his tuxedo into the air, from where he falls back into it, but upside down, and legs through sleeves.
Jerry frees himself and accidentally drops a huge sandbag on Tom as he is reaching the climax, causing him to get knocked through the floor with a loud crash.
Now the mouse is above, and the cat is stuck below, with his head flattened by the sandbag hit, and Jerry sings the last section of the performance himself (albeit in a high-pitched voice).
An infuriated (and obviously upstaged) Tom raps on the floor with a broom and sends Jerry flying, but this just adds to the sensational mouse's drama singing the final few notes, as he makes a graceful balletic landing before receiving loud applause.