"Bugs' Bonnets" is a funny Bugs cartoon which gets a lot of mileage out of the high concept premise (that is, the hat defines a personality). My favorite gag is when Bugs puts on a gangster hat and repeats "See?" and "Out." many times in short order.
However, the real highlights here are the abstract backgrounds. One of the things I love about this era of Looney Tunes is how experimental the crew got in making unique-looking backdrops, a far cry from the realistic styles from the late '30s to early '50s. The setting is an early fall forest, but it's not drawn lushly as to imitate real life; its influence is more UPA and magazines of the time, where objects such as trees and rocks are more loosely defined but still recognizable to the human eye as to what they are. The color combinations are similarly fantastic, with the predominant color being green, but mixed with browns and blacks, plus splashes of reds and yellows to signify fall. Still frames from this cartoon could be used as actual paintings in a museum, they're that striking. At the same time, the backgrounds don't overtake the comedy- it's more something extra you appreciate after you've seen the cartoon a couple times.
This wasn't the only LT cartoon to experiment with background styles, but it was one of the most impressive results.