A Stock Phrase. When a character is struck speechless, stunned, going through a Heroic BSOD, or generally unresponsive for whatever reason, another one will tell the responsible "I think you broke him/her." Or someone in the peanut gallery will just comment, "I think X broke Y," or any variation thereof. Most often whispered as an aside. Frequently used for comedy, but can be part of a dramatic setup too. Examples of I Think You Broke Him include: