What goes through the mind of the suicide bomber just before he pulls the string?

I was reading some of the news stories about the three guys in Brussels, and I looked at the pictures of them on the news. They look like ordinary guys pushing luggage carts around an airport, like you see a thousand times a day, everywhere.

I figured they were talking to each other as they pushed the carts through the airport terminal.

Do you think they are pumping each other up? “See you in paradise, Mohammed!”. Are they thinking of family? Are they thinking of stuff they forgot? “darn, I forgot to pay the water bill.”

I imagine at some level they’re praying, but for what?

I can’t get my head around why a person would choose to blow himself up in a public place.