The 24-year-old defender, a self-confessed Celtic fan, struck just nine minutes in to the clash with the Glasgow side on Saturday, which handed a win to the league's bottom club and consigned Ally McCoist's team to defeat.
Allison said: "I just turned and swivelled, and saw it hit the net.
"Nobody would have backed me to score – it's only my second professional goal so I was just delighted to get it and delighted with the three points.
"I'm just a wee guy from Granton. It's surreal – it's not really sunk in. I'm a Celtic fan myself if I'm being honest. It was documented that I was a Hibs fan because I said it was a dream come true to play at Easter Road when I was at Falkirk, but that was just because all my friends are Hibs fans."
Allison said that Rangers captain Lee McCulloch was the first to congratulate him after the game and the touch from the experienced former English Premier League man was greatly appreciated.
The Edinburgh man, a labourer by day, has been inundated with texts, Tweets and Facebook messages and said he will enjoy the limelight – even if it involves a good portion of light-hearted ribbing from his pals.
Allison said: "I'm getting dogs abuse off everybody who are seeing my ugly mug in the papers and stuff like that. I suppose it will only last a couple of days so I'll enjoy it."