Neil Lennon reckons Celtic will have given Gio van Bronckhorst a migraine that will take a couple of days in a dark room to recover from.
And the former Parkhead boss has revealed he is "itching" to get back into management with the Sunderland job in his crosshairs.
Lennon watched on as a fan on Wednesday night as his old team blew rivals Rangers away to reclaim top spot in the Premiership.
A double from Reo Hatate and a strike from Liel Abada sealed a rampant win to put them top for the first time since Lennon was in charge.
And Lennon reckons the nature of the defeat will have sent his old adversary Van Bronckhorst into hiding - for a couple of days at least.
He said on talkSPORT: "Managing was a great privilege. I played, captained, coached and then managed the club twice.
"They were the best years of my life. It is 24/7, there's no question of that, but it's everything you dream of.
"I knew exactly what Ange was going through on Wednesday night because it was an amazing first half performance.
"Psychologically the momentum is with Celtic at the minute. Gio will be sitting in a dark room for a couple of days scared to pop his head out."
Lennon has been out of work since he was relieved of his duties at Parkhead last season and says he's enjoyed the break.
But he's got the "itch" to get back in now and feels he still has plenty to offer.
"I'm only 50 and I've still got the hunger," he went on.
"I don't want to talk myself up but I still feel there's plenty to offer.
I've had almost a year out which I've really enjoyed, I've really enjoyed a little bit of normality in my life for the first time in a while.
"But you get the itch. You're a certain kind of competitive animal and that competitiveness stays with you.
"I would like to get back in."
Lennon has been linked with the vacant post at Sunderland alongside the likes of Roy Keane, Grant McCann and Alex Neil.
And he says he'd jump at the chance to take over the League One promotion hopefuls and get them back into the second tier.
He said: "It's a big club with a fantastic fanbase. They're in a reasonably good position in the league, so that would definitely be one I'd be interested in."
