Jackass alum Bam Margera claims he was rudely awakened last night by a butt-naked girl who broke into his West Chester, Pennsylvania house, and climbed into his bed.

Law enforcement sources who spoke with TMZ say a freaked-out Margera tossed the girl on the floor and rushed to dial 911.

Rather than turn the nude intruder off, the rejection apparently got the girl aroused, because Margera told the police she began to masturbate as he was talking on the phone.

Afterwards, Margera decided he'd seen enough, and removed the girl from his residence.

Police arrived a short while later and found the girl, still in her birthday suit, roaming nearby. She was taken into custody on charges of burglary, criminal trespass, and stalking.

[photo via AP]