This study explored the feasibility and effects of humour-related interventions for mentally ill adults. Twelve, randomly assigned, participated in each of 3 arms--stand up comedy training (the experimental arm), discussing comedy videos (the active control arm), and no humour-related intervention (the passive control arm). Quantitative and qualitative data were collected at baseline, end of interventions (3 months) and follow up (after another 3 months). Scale comparisons were largely negative, although self-esteem marginally increased in the experimental arm. Interview responses indicated benefits for the interventions, including improved self-esteem in the experimental arm. These results, though mixed, justify further study.