You’re loading in, or out, of a pub, you’ve got your arms full of obviously unwieldy and heavy amplifier or speaker cabinet, and there’s an ugly lump of humanity in your way. And he shows no sign of moving despite looking at you. A polite excuse me, twice, and it moves just enough to let you pass. He’s just trying to impress his mates, or a woman and cause a confrontation. Small minded prick. (decode that any way you like)