"when i ran back to the deck chair to get rid of my underpants, i noticed someone lying stiffly under the chair. not moving, not reacting." Kind of creepy, but

"when i ran back to the deck chair to get rid of my underpants, i noticed someone lying stiffly under the chair. not moving, not reacting." Kind of creepy, but still - she didn't actually see his face. Could be someone completely different, like you say.