Emergency, fire warning etc.

Body Contact: finger-to-back (hand, leg)
Hand Shape: first finger
Movement: finger draws a big X shape
Intensity of Movement: heavy
Speed of Movement: slow, fast
Frequency of Movement: repeated until a response is given
Size: large
Body Orientation: free
Body Posture: free
Body Position Levels: free
Other: Must be separable from all other messages. Used in an emergency. Touch must be perceivable through thick clothing.