10 Movie Characters Who Ruined EVERYTHING

10. Tammy & Andy - 28 Weeks Later

28 Weeks Later revolves around Don's (Robert Carlyle) children Tammy (Imogen Poots) and Andy (Mackintosh Muggleton), who decide to sneak out of the UK's fortified safe zone District One and return to their family home in order to retrieve a picture of their presumed-dead mother, Alice (Catherine McCormack).

Even accepting that the pair miss their mum and desperately want to find a picture before they forget what she looks like, it's a risky move at best, and an outright stupid one at worst in the midst of an undead apocalypse.

And indeed, once the siblings make it home they discover Alice, who is alive but an infected, asymptomatic carrier of the Rage Virus. 

The trio are soon enough scooped up by the U.S. Army and brought back to District One, after which Don becomes infected by Alice by kissing her, causing the Rage Virus to quickly spread through the safe zone.

Basically, Tammy and Andy's decision to sneak out rather than stay put in safety ends up costing untold numbers of lives. What a mess.