Chinchillas are beautiful and delicate creatures. They are also prey animals and can spook easily.
During play times chinchillas can over exert themselves and cause injury. Always give playtime moderatly, watch your step when moving around them and keep in mind that your size, sounds, and movements can be scary to them.
When catching or holding a chinchilla bring them close to the body so they feel safe and secure hold by the base of the tail to keep them from taking the flying leaps.
Always remember they are smaller then you and fragile, treat them with respect and they will return the favor.