Hare KRISHNA! Here are some incredible events mentioned in SB
1) diti pregnancy lasted for full 100 years
2)The tug of war between the crocodile & gajendra elephant continued for 1000 years!
3)It took 365 days for indras vajra to cut off vrtasuras head!
How will common man believe in such events? like didnt crocodile get bored? the crocodile could have found 1000 preys in half the no of years and difficult to believe that vrtasura stood at one place for 365 days waiting for his head to be cut off!!