Sightseers
(2012)

Chris (Steve Oram) and Tina (Alice Lowe) have headed off on a caravan holiday for a week, but Tina soon realises that Chris has been deliberately killing people they've met and making their deaths look like accidents. Despite initially being shocked, Tina's love for Chris means she eventually joins in the killings, enjoying the rush it gives here.

After some ups and downs on their trip, they set fire to their caravan and climb to the top of a tall viaduct with the intention of killing themselves. Chris jumps but Tina lets go of his hand at the last second, and Chris falls to his death.

Order of deaths:

Thanks Alasdair!