The eccentric rocker arrived at Will Rogers airport in Oklahoma City on 11 November (12) with a dead grenade in his carry-on luggage, prompting Transportation Security Admission officials to shut down the terminal while they conducted a full-on investigation.
Coyne revealed he received the device at a party as a joke and officials ruled he wasn't a threat to other passengers. He was later cleared for take-off, according to Tmz.com.
Apologising to his fellow travellers for the confusion, he wrote in a post, "Sorry Sorry Sorry!! Everyone that was inconvenienced by my grenade at Okc airport."