That's what our Cleric of Tempus (1Ftr, 14Clr) thought....
He made the roll with a grin and ... rolled a 1.
Instant death from one tail attack of a Nightcrawler.
I had a situation where I rolled two natural ones in succession. The first was a fort save against horrid wilting, the second against the massive damage roll. And he had full HP at the start of that round.