That's nothing, Tycho Brahe used to bring his pet moose to parties. It eventually died when it fell down the stairs drunk at a party at the castle in Landskrona.
Delirium tremens was the first thing I thought about this sentence)))))
If you are asking whether it should be parsed:
- Słyszymy (konia w korytarzu) or
- (Słyszymy konia) w korytarzu
It's the former – latter would require a comma(„Słyszymy konia, w korytarzu”).
That guy provided you with a link to Słownik Języka Polskiego where NATIVE SPEAKERS ask problematic questions. The professional Polish philologist answered that there is a LITTLE difference. Don't mind it. Both are correct but "na korytarzu" is more popular and natural :)