In yet another incident involving stray cattle at the Indian Institute of Technology in Bombay, a bull entered a classroom and the video of the incident has now gone viral on social media.Video shows a lecture in progress when the bull casually strolls into the classroom. While the professor and a few students attempt to drive the animal out, others look amused as well as frightened.The incident reportedly occurred on Saturday. Authorities of IIT Bombay said that it was not clear from the video when and where the incident took place, adding that they were looking into the matter.Students claim that it was raining heavily when the incident happened, and the bull may have entered the building for shelter, straying into the lecture hall.This incident comes up barely after a similar one few weeks ago..On July 11, a student of the same college was attacked by two stray bulls while he was on his way to the laboratory from his hostel.