A chain saw is the appropriate tool in this case. Saw blades that are chipped, bent, or in any way damaged should be discarded immediately. Use clamps or a vise to hold work in place. It's safer than using your hands and frees both to operate the tool. A properly sharpened saw blade provides better and safer performance.
Sharp blades minimize stalling and kickback.
Keep children away from the work area at all times. Never allow them to operate power saws. Use rubber or other non-slip matting around the work area to prevent trips and falls. Keep the floor area clear of debris. Wear safety glasses, but don't wear jewelry while cutting.