1) Humorous 2) Humourous 3) Sad 4) Tragicomical 1) Tragedy 2) Waiting for Godot descriptor 
[adj] - (drama) of or relating to or characteristic of tragicomedy 2. [adj] - manifesting both tragic and comic aspects 3. [adj] - having pathetic as well as ludicrous characteristics
tragicomic 1. Having pathetic as well as ludicrous characteristics. 2. Manifesting both tragic and comic aspects. 3. Relating to or characteristic of tragicomedy or a drama in which tragic and comic scenes are intermingled.
tragicomical adjective having pathetic as well as ludicrous characteristics; `her life...presented itself to me as a tragicomical adventure`--Joseph Conrad