Sebastian And The Human Soldiers!
Whoosh!
Sebastian went racing like the wind through the secret exit.
His plan didn't change because of the alarm. His contingency plan in the case of a scenario like triggering an alarm, he simply decided to penetrate the mansion's defenses instead of infiltrating which was his original plan.
He was pretty sure that the soldiers manning the mansion were already working on pinpointing his current position down, and if they already did, a large group of soldiers was probably already surging his way.
All these warranted that he moved as fast as possible, he was simply not stopping. Stopping now would make subsequent attempts 10 times if not a hundred times more dangerous.
The secret escape passage was built like a huge tunnel. For already aging men like the U.S President, they would probably have a hard time sprinting inside it as they had to bend just to move safely inside it.