New Delhi, Jan. 28 -- Sky Force Box Office Collection Day 4: After maintaining a winning box office streak, Akshay Kumar-Veer Pahariya's aerial action thriller hit the inevitable Monday slump on January 27.

Had it continued to maintain its monument, the film was expected to near the Rs.100 crore mark by the end of Day 4.

However, Sky Force's initial success can be attributed to Republic Day celebrations and the big discount the makers offered on online ticket bookings.

The Akshay Kumar-Veer Pahariya starrer saw a 77.68 per cent decline in its earnings on Day 4.

The movie slipped a little in its real test, which began on Monday, as the heavily discounted tickets did not work their charm on a weekday.

According to Sacnilk, the film man...