Unfortunately, I have a prior commitment to perfect my ninja training. My sensei is counting on me to master the ancient art of stealth, agility, and sword fighting. I'm sure you understand.
My cat ate the important papers I needed for the meeting.
I have to adjust my disguise, my ninja alter ego is not convincing enough for the mission.
My nunchucks are in disrepair, I need to find a new supplier.
My sensei is not responding to my texts, I'm starting to worry about our entire clan.
My socks are on the floor, I need to focus on my ninja training, not laundry.