I've always found the idea of sleepwalking a bit creepy.

Strap this girl to her own bed:

LONDON, England (Reuters) -- A teenage sleepwalker was rescued after being found fast asleep 130 feet (40 meters) up on the arm of a crane, police said on Wednesday.

Emergency services were called to a building site in London after a passer-by spotted the 15-year-old girl curled up on top of a concrete counterweight high above the ground.

The teenager, who has not been named, had climbed up the crane and walked across a narrow metal beam while fast asleep during the incident, which happened on June 25.

It's a shame the girl "has not been named". Must be hard to get all the way to your teens without a name. Some weird parents out there. ;-)

The scientific term for sleepwalking is somnanbulism, or somnabulation. (Which is a word simply meaning sleep ("somn") walking ("ambulation") in Latin.)