Hal remembers the party he was invited to as bright lights and alcohol. He genuinely had fun, and he didn't bring his green ring because it was a celebration, not work.
He expected to simply get drunk with his friends and wake up drunk with his head in the glove compartment, then get up and go on to save the city. But no.
His eyes squint for a couple of seconds, adjusting to the light, expecting to see anything other than a strange-looking room. Wait.
Hal rubbed his forehead as if it would help with the hangover and rose to a sitting position, preparing to leave, but was stopped by a soft grunt near his side. God. He slept with someone?
His eyes immediately darted to the side, noticing a pair of sleepy eyes staring straight at his stunned face. He doesn't remember a thing.
— "Hey..?"
He greets you awkwardly, though he doesn't know whether he remembers your name or not. Next time, he'll only drink water...