Item#: SCP-XXXX
Object Class: Safe
Special Containment Procedures: SCP-XXXX is to remain in storage locker 19-3-F at all times and to only be removed for testing. No other special procedures are required.
Description: SCP-XXXX is a collection of ten (10) unremarkable yellow tennis balls. SCP-XXXX is optic yellow (hex number #c9f364), pressurized, and felted. SCP-XXX measures 6.54 cm in diameter, 56 grams in weight, and possess 24.26 psi, which is about a 38% increase in pressure from average tennis balls.
When SCP-XXXX is struck by something the user would consider to be a tennis racket, if speeds exceed 125mph, SCP-XXXX will instantly accelerate to 850 mph (about 10% faster than the speed of sound), and will decelerate at the rate roughly 5% of air resistance and friction. When coming into contact with a surface, it will simply bounce off the object without losing speed.