He wanted to make sure you saw it!

What can you give a roomba instead of treats to tell him that he’s a Good Boy

Asking for a friend

You know

I have a roomba

I have knives

I could

I could give him a knife

this seems like a spectacularly bad idea considering you started off talking about how he headbutts your foot

I didn’t say it needed to be a SHARP knife

I’ve got a rubber training knife we use in class for knife technique training

Excellent

Something tells me that this wont end well for your ankles but I applaud your disaster decisions anyway

It’s just plastic, my Achilles tendons are safe. 

And it’s good training!

Training for him to stab people or training for you to dodge?

Yes.