When you first get scared half-to death, you are 50% dead. Then you'll get scared-half to half again, so that's 25% extra, so you are 75% dead. Then you are 87.5% dead. Then you are 93.75% dead. Then you are 96.875% dead. Then you are 98.4% dead. You won't die, since you could always still be scared half-to death.