When the call for the wedding was made Tim moved to the main ballroom where the ceremony was to take place. He took up his position up at the front as one of the grooms men with the ring in his pocket. While not the best man he was asked by Bruce to keep an eye on the rings. It may have been the most nervous Bruce had even been in Tim's lifetime. He was happy it was him who was asked, but he figured this was because the others for some reason or another were uninterested. Still the box was weighed down with more than just a diamond the size of a small car. 

Ice

That is what is running through the veins of every member of the bat family. It is the only way to describe them. After all how many people jump into action as fast as them when armed hit men storm into a room full of people. For Tim it took all of a second to understand the situation. This wasn't a robbery. If it was it was missing the classic Gotham flare for a show. It didn't start with someone shooting the chandelier and begin the age old 'This is a robbery' tag line. Instead it was fast betting on the element of surprise. There was the quarter second between the arrival through the window and the men scanning followed by them firing at... Cassandra who was already jumping into action by literally running at the barrel of a gun. 

Get people out of here. They have weapons distance and disarm. The plan was already mapped out in Tim's head. The chaos of panic made it difficult to organize the people, but he didn't have to. With a panicked crowd they were easy to understand. Moving to the wall he started typing into the smart board, a computer that controlled most of the house. After the last key stroke every door of the ballroom swung open. The crowded didn't need to be asked to leave. They rushed whatever door was closest. The risk of someone being trampled was there; however, the decision was easy for Tim to make. A crowd able to escape an armed killer was better then a crowd trapped with an armed killer.