It was a goal of simple brilliance as the right-back picked up a square pass from Stuart Lewis about 40 yards from goal, carried the ball forward a few yards and lashed it into the top right corner.
The screamer provided the crucial second goal as Clive AllenÃ¢â‚¬â„¢s young team overcame a Charlton side that included Premiership regulars Darren Ambrose, Jay Bothroyd, Kevin Lisbie and Jason Euell at Stevenage - Charlie Daniels and Calum Davenport also on target in a 3-0 win.
"The space just opened up, I went into it and caught the shot so sweetly," he said. "I know IÃ¢â‚¬â„¢m not renowned for scoring goals like that - they usually come from close range after a run into the box or something like that.
"No-one closed me down and I just thought I might as well hit it and it worked out well.
Capping a night to remember, centre-back Calum calmly stroked home a penalty to complete the scoring.
Steo said: "Jacko had the ball and Calum just said 'let me have it' and Jacko replied 'okay, go on then' and he was just so confident. Whoever feels that confident should take it and Calum just slotted it home."
It was our reserves' ninth successive win and with title rivals Arsenal drawing at Chelsea, left us four points clear at the top of the Barclays Premiership Reserve League South.
"It was a great win," added Steo. "Charlton had a strong team out and although we had a couple of experienced players they had Euell, Bothroyd and Lisbie up front and Ambrose in midfield.
"I thought we played well. The young lads did really well and worked really hard especially as they were up against physically stronger players but they got their tackles in throughout."
You got the impression that Stephen Kelly couldn't quite believe the quality of his wonder strike as our reserves continued their title charge against Charlton on Monday night.