In a recent game, the situation came up where one of the players wanted to take a charge action. The path, however, was obstructed, and the player suggested that they jump as part of the charge. I don't have the specific charge rules on hand, but I believe that they state that you cannot make a charge action if there is any obstruction.
But the question remains: can you jump (or a similar type of movement) to charge through an obstacle or difficult terrain?
