Hope your dad was ok!
And know how that is - father in law sets his alarm off on occasion, as well as pocket dials us with his mobile. Unfortunately he is really rather deaf so when we call back he doesn't answer. So mad dash to drive to his only to be greeted by him with a surprised expression and an offer of a cuppa
I got there at 7.20am only to find him sitting on the sofa with a cup of tea.
I asked him about the phone, he ssid "oh maybe I ignored it"