From the 2012 press release:

Monster Jam is heading back to the Tacoma Dome from January 13 – 15. The engagement in 2012 will mark a special celebration as the 30th Anniversary of the monster truck icon Grave Digger® ! That celebration kicks off in Tacoma as the first stop of the West Coast tour!

I don't even have kids, but wouldn't it seem a little spooky to take your little ones to the Monster Jam at the Tacoma Dome? I mean, this just happened a couple of years ago. I guess money talks and [terrified] parents walk?