What you are experiencing are most likely episodes of epilepsy or seizure attacks.
Epilepsy is result of increased, chaotic brain activity and its manifestation depends on affected area of brain.
When the person is aware of what is going on, and there is no interruption to consciousness, the seizure is classified as partial simple epilepsy.
You may get a strange feeling, as though you're out of touch with your surroundings or you may experience sensory distortions or other sensations.
Actually, a change to the sensation of taste, smell, sight, sound or touch, is one of the symptoms of partial simple seizure.
Some people get a warning sign, such as a strange smell or feeling, before their seizure starts.
The attacks usually lasts from few seconds to few minutes, tending to be same every time they occur.
See neurologist!