No, he holds you to the agreement you already made

"Now, now my friend let's not be so hasty," the professor takes a conciliatory tone in response to your outburst, "I understand your reluctance, but I must remind you, you did consent in writing to this experiment. I could perhaps appeal to your sense of honour to keep to the agreed contract. Or beg you to think of the future generations that will benefit from our work here. But instead, I will remind you of the extremely generous renumeration you'll receive if you fellow through. Give the current state of your finances, can you really afford to walk away now?"

He proffers a sheaf of papers you recognise as credit card bills, making you wince at the reminder of the state of your finances.

"How, how long," you ask through gritted teeth reluctant to admit the truth of you situation "How long do you expect me to stay like this?"