If you happened to be a passenger on a red line Luas recently, and noticed a guy dressed suspiciously like a character from an 1990s video game running alongside you while punching the air - well, you'll find the explanation for his strange behaviour below.
Emlyn Lewis - who clearly has an affinity for dressing up as retro video game characters, and regularly busks in Dublin as Super Mario - has previously made similar videos of himself racing the Luas dressed as Sonic the Hedgehog and Mega Man.
This time, he donned the costume of Axel Stone from the Streets of Rage game series, and took on a few baddies in a cleverly-edited video as he races alongside the tram.
Watch it below: