Fridge, a 1995 short film written and directed by Peter Mullan (best known for his work as an actor in movies such as Danny Boyle’s Trainspotting and Ken Loach’s My Name Is Joe), is the kind of work that is often described as “gritty” — an appropriate descriptor given its Glasgow slum milieu and realist crescendo of narrative action, but one that is still merely a label that doesn’t quite serve Mullan’s affecting humanist tale about a pair of homeless alcoholics struggling to help a young boy trapped inside an abandoned refrigerator.