Ok I have mentioned this before but when I go I wanna be buried in one of my machines.
With the Backbox as the tomb stone. Two Player with Player 1 score on 1965 (year of birth) and Player 2 on year of death.
Of course the Game Over light would be flashing. The way Im putting on weight latley might have to bee a widebody machine 
Is this weird??
PS. This is a joke by the way 
As long as you cover the top with dirt I can't see an issue with it. However if you want everyone to look down, through the playfield glass this may be a little unsettling to some!
I do like the idea.
