A dancer doing various locking moves. Locking is a style of funk dance, which is today also associated with hip hop. The name is based on the concept of locking movements, which basically means freezing from a fast movement and locking in a certain position, holding that position for a short while and then continuing in the same speed as before.
A tornado warning is worse. It means that a tornado has been detected or the threat of one is imminent. A tornado watch means the overall conditions are favorable to form in a general area.
A tornado watch means tornadoes are possible in the area. You should review your emergency plan, check supplies and be ready to act quickly if a tornado does approach. A tornado warning means a tornado has been visually sighted or indicated by weather radar and you should act immediately.