Holy Bathroom Lights

An elderly man in his eighties goes to the doctor for a checkup.
The doctor greets him, runs through the checkup procedure, and finds he has extra time left before the the end of the appointment, so he starts talking with the man. Eventually, they breach the topic of religion, and also being a devout Christian, the doctor asks how his relationship with God is going.
The elderly man replies, "It's more amazing than ever! In fact, every time I open the door to the bathroom, I see the holy lights!"
The doctor remarks how great is was that he is so close with God.

Later that week, the doctor calls the elderly man's wife.
"It's amazing how close a relationship your husband has with God! He told me how he sees the holy lights every time he opens the bathroom door!"
The man's wife sighs and replies, "Oh no, he's at it again??"
"At what again?" the doctor responds, confused.
The man's wife sighs again and finally explains,
"He pees in the fridge."