Gandpa is lucky he has not made the robbers kill everyone. His move is very dangerous, any robbers could have riposted with gun or automatic weapon resulting in a bloodshed.

I totally disagree with #3, you just can't ripost to threat with threat, escalation of violence is never a good thing.

#1 : don't know but it's worth pushing 5000 times the same button

Good news for mars (or other distant planets) explorating robots !!

what da fuck did I just watched ?