The Goal Reflex

Also known as 'The Goal! Syndrome'.
A reflex evolved from extreme over-watching of soccer, hockey, football and other sports.
The reflex involves the person subject to the syndrome shouting "GOAL!" every single time anyone or anything in the company of the person exclaims the word "goal", with any meaning and under any kinds of circumstances.
The reflex itself is found mostly found amongst football hooligans, soccer fanatics and hockey-interested.

The 'real' cause of the syndrome is unknown, however it is speculated that it is caused by the brain reacting to the word 'goal' as, as it is in the most sports, a word of adrenaline, ecstacy and/or strong feelings (positive or negative).