Song meaning
Brett said the song was about "how it feels to question too often and too deeply".
Ending
Jay about the abrupt ending of Blenderhead: "That song was recorded on 'tape', and as such we spliced a strip of leader tape on the very last beat of the song, cutting off any ringing cymbals, guitars or tape hiss... just blank. We did the same thing in the ending of 'I Want Something More', where Greg says 'I want something... (leader tape).... moooooore'."[1]
Trivia
There is a British band named after the song and also an American band called Blenderhead who, according to them, didn't name their band after the song.