Seizures can affect people in different ways, depending on which part of the brain is involved. Possible symptoms include: uncontrollable jerking and shaking, called a "fit" losing awareness and staring blankly into space becoming stiff strange sensations, such as a "rising" feeling in the tummy, unusual smells or tastes, and a tingling feeling in your arms or legs collapsing Sometimes you might pass out and not remember what happened.