No, not anaesthetics, but  numericals. Each of the ten clips includes a number in  the song title or the performer’s name. What a variety of music from 1973 – 2014

All I want is the sum total

Good luck; songs by Bob Marley & The Wailers, Blur, Ariana Grande, Four Tops, Five, 10cc, The White Stripes, Atern 8, Heaven 17, Level 42