In case you, like some posters on Reddit and Twitter, were startled by the sound of two fighter jets flying low over Dublin today - we're pleased to say you can relax.
The jets were on a fly-by as part of the celebrations around the American football Croke Park Classic.
One redditor definitely wasn't impressed:
"2 us warplanes doing a flypast Croker*," wrote CanucksFanInDublin.
"Set off every alarm on my road and scared the shite out of my three year old niece....a bit of warning from anyone would have been nice."
Crazy noise that nearly lifted roof off was two F16 jets ona Croke Park Classic flypast. Now retuned to England. #rtenews #jet #dublin
— Joe Mag Raollaigh (@joemagraollaigh) August 30, 2014
Pregame show for the @CrokePkClassic starts with fighter jets flying over the stadium in Dublin #PSUvsUCF ESPN2 pic.twitter.com/ckcIOze2wo
— ESPN College Football (@ESPNCFB) August 30, 2014
No video available yet, but we unearthed this from 2012, to show the kind of thing:
Not only were jets sent skyward to mark the occasion today, some of the US lads