in the puppy years skit, the characters are pierced through with various things, a lot of blood flows from them, the piano cuts off the hands for the characters, blood is spilling from the hands, the piano falls to the characters, covered in blood. The violence in this sketch is for amusement.
In one of the animations, a man puts shaving cream all over his head and decapitates himself.
In S1E13, Ivan the Terrible slices another man in half with a sword. This is very brief (lasts less than 5 seconds) and played for laughs.
Some episodes contain unrealistic, cartoon-like violence and/or over-the-top bloody violence. Any instances of bloody violence are extremely overplayed due to the technical constraints of the era in which the series was produced; and the violence is intended to amuse, as opposed to horrify; however, younger viewers may be disturbed by some of the stronger instances of violence.