It's a simple and well executed joke. For me personally the comedic timing felt a bit off but the animation was great.
Reviews for "Caution is Key"
Brewster responds:
I wish you would've said specifically what was off, but I guess I'll try to work on my timing in general. Thanks for the review.
Good jokes don't need to be long.
Brewster responds:
Cheers to that
Why not just break the door?
Brewster responds:
why not just keep your ridiculous ideas to yourself?
but, he was caution... he used the rock to test the bridge... missing the key under it has nothing to do with not being caution...
Brewster responds:
tomato, potato.