One Florida woman was just trying to do a good deed, but instead got the shock of her life when she found an unfamiliar houseguest lounging inside her friend's Florida trailer.

When Vicki Mixon went to turn on the air conditioning in Sue Balkcom's mobile home in Panama City Beach, Florida, she was startled to find a man wearing red swim trunks resting in an armchair in the living room.

Mixon believes Michael Carl Lindsey broke into Balkcom's mobile home using a spare key and then made himself comfortable. He ate, watched TV, cleaned up, showered and even took a nap.

"He set up residency, so to say," said Major David W. Humphreys Jr. of the Panama City Beach Police Department.

But once the uninvited house-sitter saw Mixon enter the trailer, he jumped out of his seat and swiftly ran for the door.

"He said 'I'm sorry,' and bolted," said Mixon. "He grabbed his plastic grocery bag and I chased after him."

Though Mixon didn't catch him, Lindsey made it simple for the police to find him. He allegedly broke into another mobile home and left behind his wallet, which contained his social security card.

In Balkcom's trailer, Mixon said that Lindsey helped himself to hot dogs, hamburgers, and a bag of Doritos.

Mixon added that Lindsey was a tidy intruder, and even washed Balkcom's dishes. He also carried his own ashtray into the smoke-free trailer.

"The shower was the one thing he didn't clean up," said Mixon. "We don't know what towels he used because they weren't dirty. He may have washed them."

Lindsey was arrested and charged with burglary.

"He was a very neat man, and the police say he was very respectful," said Mixon. "He said to them that he was just a little down on his luck."