I am a noob at Aikido (2 months). Say (worst case scenario) I woke up in the night and found some scumbag going through my stuff (single story house) what would be the single most important Aikido waza I could learn? Or I guess in general what would be the single most effective thing I could ask my instructor to teach me? I will be asking him next class btw.

Thanks for your input. This is a very real concern for me.