According to the report below from The Age your thread header and comment only provide part of the story:
"... Ms Bishop's security detail and university security guards quickly surrounded Ms Bishop to keep the protesters at bay and ushered her into the hall. They then pushed and shoved the students back from the hall entrance to keep them out. Student Union board vice-president Tom Raue was among the protesters and said shortly after their actions were captured on video that he was pushed down a stone stairway by a plain-clothes security guard. The police and security guards were very violent," he said. "It was quite rough." Mr Raue described the security response to the students' demonstration against budget cuts as an "over-reaction".
