The Web design firm, neboweb, has this wonderful tagline for one of the examples in their portfolio.
MARKETING IS MORE FUN
WHEN YOU SMASH STUFF
Aside from the fact that I would not punctuate this line in the header, it’s a perfect piece of writing. It’s unexpected, amusing, and it serves two important functions.
First, it gets your attention. Smashing and blowing stuff up always gets people’s attention. It’s unexpected because we’re not very used to advertisements using destruction to sell.
Second, it disarms you. You’re amused. You immediately like the design company for making you chuckle. It makes you feel like they’re human and have a sense of humor, not just a bunch of pixel sharks out to get your business.
There is a benefit to working with a design company with a sense of humor. They might be able to make you seem more human and approachable to your own customers.