My favorite listening error as a child was in the Christmas
hymn O Come All Ye Faithful;

O Come All Ye Faithful

O come, all ye faithful,
Joyful and triumphant,
O come ye, O come ye to Bethlehem.
Come and behold Him,
Born the King of Angels!
O come, let us adore Him,
O come, let us adore Him,
O come, let us adore Him,
Christ the Lord.

I remember singing the chorus at the top of my lungs as,

" O come let us side door him"