Verbe/Participle "shatif" ?

[Bruno Aeschbacher]

I am about to translate a short story for my Russian studies and couldn't find from which verb derives the form "схатив" in the following passage. Also, is  "схатив кишку" a set expression and how could it be translated?
 
Контекст: 
(Encoding Win1251)
 
"Горит дом. [...] Пожарные качают воду. Один из них, схатив кишку, поливает дом."
 
Does anyone happen to know by whom this short story was written?

Большое спасибо ! 
 
Bruno Aeschbacher
Женева, Швейцария
onurb at swissonline.ch