Body Bags

The first segment "The Gas Station" is the only frightening story in this trilogy. Set at night, apparently in the middle of nowhere, it has a plausibilty that the others lack (similarly to Hitchcock's "Psycho", it is scary because it's not completely beyond the realms of possibility). Plenty of atmosphere, a little gore and enough sudden shocks and suspense to make it worthwhile. The second segment is at times funny, but not at all scary. The third is an improvement on the second, but more fantastical than the first and therefore not as frightening.

The scenes with the man in the morgue, between the segments, are pretty weird. Lots of jokes about corpses. Fine, if you like that sort of thing.