Actually you might not know anything about the Blue Man Group - or perhaps you’ve heard of them but aren’t exactly sure what they do.
That's not surprising as it is hard to describe.
Joe Woolmer, one of the Blue Men who was introduced to the show by his Brummie mum, has been in it for six years and still isn’t sure how to explain it.
“I tell people to go to YouTube!” he laughs. “You can’t say we’re like something else because it’s so much its own thing.
“I like to say it’s a celebration of curiosity and being alive.”
The Blue Man Group is on a world tour and has already been to China, Saudi Arabia, South Africa and Israel.
I flew to watch them in Zurich as they prepare for the one UK date on the tour, at the ICC in Birmingham just after Christmas.
Here’s more on the funny – in both senses of the word – blue men.
1. Three blue men appear in each Blue Man Group show but there are four in each cast who rotate so they can get a night off. In the show coming to Birmingham, two are British, one German and one American.
But as they don’t speak in character, it doesn’t matter what nationality they are. This is a universal show which makes sense in any language.
2. There are currently eight Blue Man Group shows on in the world – there are five resident shows in America, in New York, Las Vegas, Orlando, Boston and Chicago, as well as one in Berlin, a US tour and this world tour.
3. It’s a mixture of rock music, colour, art and audience participation. It’s funny and clever.
General manager Zoe Caldwell says: “It’s not designed for children like a Disney show, but it’s a theatre show which kids will love.
“It’s more about how you feel when you experience it. It’s pure entertainment and joy.”
4. The blue men put on a latex cap and prosthetics which cover their ears and then are covered in blue grease paint from the neck upwards. It’s the consistency of Nutella spread and is wet as it never dries. It takes about an hour to apply.
5. The first three rows of the audience are given waterproof ponchos because they’re in the splash zone, from all the paint which flies everywhere when the blue men are drumming.
6. Even though they are used to taking the paint off, they still find bits in crevices. Joe Woolmer says: “It’s an occupational hazard to find bits of blue up my nose, in my fingernails, in my ears and even in my eyes.”
7. It takes three hours to prepare the show every day, mainly clearing up the mess from the night before. There’s a lot of paint and cereal on stage and streamers in the auditorium.
Paint comes out of the blue men’s chest and every day they practice catching paint balls in their mouths. You won’t believe how many they can hold.
8. There’s a live band on stage while the blue men play instruments too, most of which are made for them from unusual materials, including plumbing pipes cut to size. The music is slightly different every night because some of it is improvised.
9. As well as paint, the show involves a fire extinguisher, jelly and lots of marshmallows.
10. Don’t arrive late because you’ll regret it. And stick around in the foyer afterwards to meet the blue men and have your picture taken with them. Just don’t expect them to say anything.
The Blue Man Group plays Birmingham’s ICC from December 28 to January 6. Tickets are available here from the Ticket Factory.