It is thought that INAD is caused mainly by ingestion of high doses of E numbers, especially those found in cheap processed foods. Possibly by E101 to E131 and E200 series, Also known to cause hyperactivity are the colours E128 (red) and E133 (blue). These colours are possibly what gives children Blue Smartie Syndrome
INAD can also be induced socially by normally involved people feeling shunned by the conversation. This can lead to them exhibiting INAD as a form of distraction as they steer the conversation round to a subject they can lead in.
Some people are naturally prone to INAD, while others rarely suffer from it.
Those afflicted with INAD generally calm down once they're back to the centre of attention. Possible cures for INAD are restrictions on the smmounts of E numbers consumed, and absolute isolation. The latter may induce fatal depression in those natually prone to INAD.
"My God, will that kid stop it with the INAD"