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I would tell you but you would just forget it anyway. Just kidding

About half of all transient global amnesia episodes start just after a physically or emotionally stressful incident. Among the triggering events commonly reported are:

Sudden immersion in cold or hot water

Strenuous physical activity

Sexual intercourse

Medical procedures, such as angiography or endoscopy

Acute emotional distress, as might be provoked by bad news, conflict or overwork

The underlying cause of transient global amnesia is unknown. The incidence of migraine may be higher than can be explained by chance among those affected by transient global amnesia, suggesting that similar processes may be involved in both conditions. Compression of the large veins that empty oxygen-depleted blood from the brain and arms back into the heart may play a role as well. Many of the physical stresses experienced just before an episode of transient global amnesia result in compression of these veins. Asprin has proven to be an effective treatment to relieve the causes and effects of TGA.

Good Luck