It is a dome made out of concrete. They call it "the concrete dome." Let's move on.
(That was paraphrasing Brian Regan's science experiment he liked to call "Cup of dirt")
I was not sure what else there was to say, so I told Google "King of Random concrete dome."
It suggested these three videos, which I updated:
I do not want to disrespect the dead or be insensitive to anyone who has "feelings," it just seemed like an odd suggestion, especially when I was querying regarding the concrete dome, and the most popular discussion was how he passed away.
During the second "The Tick" series, where Patrick Warburton was the titular hero, he met his hero, a Superman-type named "The Immortal," who died doing what he loved.
The Tick read The Immortal's autobiography and said "I don't get it, I read the entire book, and he never mentions being dead!"
Don't ask me why that show got canceled!
I could not find any additional information about the concrete dome. If you search YouTube for "King of random concrete dome" you get some videos where they use the dome, but they never talk about it.
Going to YouTube I saw this clip show in his memory: