The Leeds winger was full of celebration after Northern Ireland's qualification - and so were the fans.
Indeed, at Leeds United, Dallas has been playing for a side struggling in the second tier of English football of late and unable to register a win at Elland Road.
On Sunday afternoon, however, the 24-year-old found himself celebrating once again, as Northern Ireland this time confirmed they will finish top of their qualifying group.
The Northern Irish had secured qualification to France '16 already but, thanks to a 1-1 draw at Finland, ensured they finished top thanks to the efforts of Leeds man Dallas and co, with Craig Cathcart netting against the Finns.
Credit to Michael O'Neill's men, who could quite easily have enjoyed their celebrations a little too much and put in minimal effort on Sunday.
They didn't, though, and Leeds fans will hope the example Dallas and his team-mates have set will resonate at club level. The 24-year-old has impressed so far at Elland Road, with Leeds supporters taking to him quite well. As the photo above and on the right shows, Northern Ireland fans have also made their love for the winger perfectly clear.
And he reciprocated the feeling at full-time, too...