Put up a 55-39 once, although my best tale of two golfers round is the one where I alternated par/double for a full 18 holes.
43 - 33 several years ago with 5 birdies and 2 bogies on the back.
Two weeks ago I shot a 34 - 44. Bogied 9 to go 2 under and tripled 10. The rest of the back wasn't much better.