Dana had imagined-- as most people with Bureau desk jobs do, no doubt-- that field work must be somewhat more exciting. But this is the kind of thing that only happens in movies, isn't it? An exhumation now and then, sure-- not business as usual, but it's routine enough. An exhumation of a possible serial killer coverup victim going flying down the hill is... it would be comical, if this weren't deadly serious.

She does freeze for a moment as the casket rolls, but takes off after Mulder. Not as fast-- he has longer legs and no high heels-- but she's no slouch. And besides, eventually the casket comes to rest with a sickening crack as it hits a tombstone.