Yah yah yah yah, yah yah yah, Yah yah yah yah, yah yah yah. Poor Seymour pushed a broom, nothing in his news but Gloom and doom. Then he lit a fuse and Give him room. He started an explosion, Holy cow, that thing which Bang ka-boom, and he's havin' some fun now. Some fun now (what with?), What's he havin' some fun now (sure is). He's a-havin' some fun now (oh boy), Ain't he havin' some fun now, Now! Some fun now! (hot damn), Ain't he havin' some fun now (yes, ma'am). He's a-havin' some fun now (oh boy), Ain't he havin' some fun now! Some fun now (hot damn), Ain't he havin' some fun now (yes, ma'am). He's a-havin' some fun now (oh boy), Ain't he havin' some fun now, now! Some fun now (what with?), Ain't he havin' some fun now (sure is). Really havin' some fun now (oh boy), Ain't he havin' some fun now, now! Some fun now (Good God, the boy.) He's havin' some fun now. (Oh boy, oh boy.) Yes, he's havin' some fun now (oh boy), Ain't he havin' some fun now! Some fun now. Some fun now. Some fun now. Some fun now. [Repeat and fade]
https://primoaccordo.net/misc-musical/some-fun-now.htm