When my grandpa gets spam calls he ofen asks if they have fainting goats, or sell goat insurance.I got a spam call from someone calling themself "Jeff" and had a VERY prominent Indian accent and told me in broken English that my "Microsoft was broken" and he needed "remote access to assist the situation". I told him I have a Mac and he hung up.
Or he sometimes sings in German.
Or when they ask how his day was he'll say "well, my wife got run over by a dump truck"
Once, he answered the phone in a shaky voice and the man on the phone asked for his credit card number or something. My grandpa said "o-oh kay, l-lemme f-f-find it". He just stood there for a good 5 minutes, then said "Dad? Dad who are you talking to on the phone?" in a loud voice. The guy hung up
