Sensory overload:

Condition in which sensory stimuli are received at a rate and intensity beyond the level that the patient can accommodate.

Near Death experience:

Experience of patients that they have glimpsed the afterlife when coming close to death. These perceptions may include seeing an intense light, seeing angels or departed loved ones, travelling through a tunnel.

Out of body experience:

The experience of being away from and overlooking ones body. The patient feels that mind has seperated from the body.