Describing something that is amazingly kick ass; here are the symptoms of seeing something that is Swagalicuos.

Painful tension in neck

Fatigue

Migraines

Dizziness

Visual disturbances / loss of vision / spots in vision / double vision / seeing spots or "halos" / nystagmus

Tingling / numbness in the extremeties

General imbalance / clumsiness

Memory loss

Restricted movement

Intolerance to bright light / difficulty adjusting to light change

Vertigo from position change or sudden standing

Difficulty walking on uneven ground / feeling ground under feet

Poor / degraded motor skills

Difficulty driving

Difficulty negotiating steps

Pressure / pain in the neck

Pressure / pain behind the eyes (soreness in the eyeballs)

Back pain

Neck spasms

Insomnia

Ringing in ears (like the tone heard in a hearing test)

Hiccups associated with drinking carbonated beverages