If they thought to do so they'd have a rude awakening, and a very unpleasant death.

"From the look of it, he died a rather unpleasant death."

I am talking about a very unpleasant real death.

A most unpleasant death by the looks of it.

Mistakes down here can mean a very quick and somewhat unpleasant death.

A small satisfaction before what would, she knew, be an exceedingly unpleasant death.

Tomorrow they would cheerfully watch her die an unpleasant death.

Or not coming back at all from a very unpleasant death.

Seven or eight of these little tablets, and you would die a very unpleasant death indeed.

Somehow it had dragged him back each time, sometimes seconds before some particularly unpleasant death.