In the future area (the drill and the siren) if you kick the siren it should every time give you the same time to act. In some cases the timer goes off in couple of seconds. There is a workaround:

• Click the siren, Rufus starts to walk there
• Put your mouse ready on the exit (up and left corner)
• When Rufus kicks the siren just click multiple times so that Rufus exits immediately
• In the next screen (main square) keep clicking really fast on some exit and then really fast back to the main square
• Keep doing these quick exits before the time runs out
• The timer should fix itself after couple of attempts

The original message about this workaround.