The incident involving Ile de Chypre was "blamed" on an ultrasonic stun gun concealed within a pair of binoculars by someone in the crowd.
The device emitted high-frequency sound waves that caused discomfort anddistress in horses, leading to the unexpected jinking of Ile de Cyprus and the unseating of his jockey, Greville Starkey.
Famously, Starkey took part in reenactments of the incident at Ascot when a high-frequency sound wave gun "appeared" to cause his mount to veer violently off course when aimed and fired at it.