A list of ever-more-specific hints:
Obviously, you need to get by the Secret Service Agent.
When speaking to him, did you notice he mentioned "other duties"?
Perhaps if he were busy with something else, you might be able to sneak by.
Is there anything nearby that might be distracting?
A noisy telephone perhaps?
Convenient that the number is posted with the telephone, eh?
Perhaps you could give it a call from the office.
If you want to get by, you'll probably need to make sure Superball stays on the line.
So you could just put him on hold for a bit. I'm sure he'll wait.