A young man gets on his knees to his love, but she turns him down. He takes out a small bottle, drinks from it, and falls to the ground, dead. Or is he?
To our modern viewpoint, suicide is rarely a humorous matter, but audiences used to be tougher, and the comedians had to be more desperate to get their laughs. Certainly Harold Lloyd would occasionally try to kill himself for love, by standing in front of trains or shooting himself.
Up until now, the earliest I could place the suicide gag in my memory was LE PENDU, a 1906 comedy in which Max Linder tried to hang himself. Although that was the motivation for the movie, it was not the comic point of the matter. I'll leave you to search for the film and make up your own mind as to whether it's funny or not.
That said, the abrupt and unornamented handling of this suicide isn't particularly amusing.