Goosebumps.
If the Republic of Ireland are going to secure a spot in the World Cup playoffs, they're going to have to do it the hard way as they take on Wales at the Cardiff City Stadium.
Going into the game, Chris Coleman's side held the advantage as a point would be good enough for them to secure a place in the playoffs but given Serbia's recent defeat to Austria, the top spot in the group is still up for grabs - provided results go in Wales' favour.
As for Martin O'Neill's men, nothing short of a win will ensure that their bid to reach Russia continues, but if the Irish are to get the three points that they desperately need, they're going to have to silence the deafening home crowd.
After Amhrán na bhFiann was played, it was the turn of the home crowd to belt out their rendition of Hen Wlad Fy Nhadau and they didn't disappoint.
Electric.
Which fans will end up singing at the end of the night though?
https://twitter.com/dionfanning/status/917464828339458050
https://twitter.com/FOXSoccer/status/917464455092383744
https://twitter.com/RTEsoccer/status/917461942897278976
https://twitter.com/FAWales/status/917460906833076226
https://twitter.com/pixieglas/status/917463510799585283
https://twitter.com/JohnBennettBBC/status/917462345835827202
https://twitter.com/DavidLawTennis/status/917460771403071488
https://twitter.com/backandacross/status/917461382915911680
https://twitter.com/morriskid/status/917461067076390917
https://twitter.com/jasonharries13/status/917461147821006848
