Final answer:
There is no historical record of John Hancock proclaiming any specific phrase when he signed the Declaration of Independence on August 2, 1776. His large signature became famous, and the signing marked the American colonies' formal intent to separate from Britain and establish an independent nation.
Step-by-step explanation:
John Hancock is famously known for his large signature on the Declaration of Independence, but there is no historical record of him proclaiming, "There, I've done it," or any specific phrase when he signed the document. The signing took place on August 2, 1776, not on September 27, 2007, as is incorrectly stated in the question.
Hancock, as President of the Continental Congress, did sign the document with a noticeably bold signature, and it was said that his signature was so large that King George could read it without spectacles. However, the widely circulated story that he said anything notable at that moment is likely apocryphal.
The Declaration of Independence, primarily authored by Thomas Jefferson, was a critical document that outlined the reasons for the American colonies' separation from Britain.
It expressed Enlightenment ideals of sovereignty and natural rights, as well as the belief in the inalienable or natural rights to life, liberty, and the pursuit of happiness. The document marked a momentous occasion for the United States, formally announcing the colonists' intent to form an independent nation free from British rule.