Probably one of my favorite songs by them!
I remember seeing in '67 or 1966 on that Leonard Bernstein special, where Brian did this song on the piano in his living room.
Curiously it was not the piano in the tent in the huge sandbox there!!
I'm talking a sliver of a lick, something super brief... drum etc etc could even be vocal...
Mine is just one guitar note at the beginning of, "Should I Stay or Should I Go" by the Clash.
At 7 sec, one single gtr note grabs me amidst the raucous loud guitars!