1. The Mishnah discusses the circumstances under which wood in fields and in private domains may be used as firewood on Yom Tov.
2. Rav Yehudah says that the Mishnah is based on the opinion of Rebbi Shimon ben Elazar and not the opinion of the Rabanan.
3. One may not cut wood from beams or from broken beams on Yom Tov in order to use it as firewood.
4. The Mishnah discusses a case of a building filled with fruit that partially broke on Yom Tov.
5. There is a dispute about how one may partake of this fruit (#4).
A BIT MORE
1. The Mishnah says that wood in the field may be used only if it had already been put in a pile in order to be used as firewood before Yom Tov. Wood in a private, fenced-in area may be used even if it is loose and was not gathered before Yom Tov to be used as firewood.
2. He understands that the Rabanan maintain that wood in a private, fenced-in area may be used on Yom Tov only when it was gathered before Yom Tov with specific intent to be used as firewood.
3. A professional work tool may not be used to cut wood that is permitted to be cut on Yom Tov. Rather, a Kopitz (a small hand-ax used by butchers as well to cut meat) should be used.
4. The Mishnah teaches that even though the building was sealed closed before Yom Tov and broke only on Yom Tov, the fruit is not Muktzah. The fact that one could not have reached the fruit before the building broke does not make it Muktzah.
5. Tana Kama: One may take the fruit by putting his hand inside the hole in the building. Rebbi Meir: If the house was made out of bricks that were not cemented to each other, one may even remove some bricks to take the fruit.