Singapore, Jan. 25 -- By the third day of his firefighting course at the Civil Defence Academy, trainee "Ah Yu" was already in trouble with his superiors.

He argued with the sergeant, slacked off during drills and did not seem to care for the rules.

The course instructor, First Warrant Officer (1WO) Abu Bakar Hussin, 51, had no choice but to punish "Ah Yu" with confinement just days before Chinese New Year, as portrayed in the Singapore Civil Defence Force's (SCDF) short festive skit released on Thursday.

The film is based on 1WO Abu Bakar's real-life experience with an unnamed trainee back in 2015.

And just as it is portrayed in the video, 1WO Abu Bakar had pulled the trainee aside to find out what was bothering him.

"He told me ...