We hope you have a box of Kleenex handy, THGers.
In the following video, 50 friends and family members from five states gather for a flash mob, surprising a woman named Amy the day before her 56th birthday.
Tragically, Amy has been diagnosed with inoperable ovarian cancer, but her loved ones wanted to “reminder her how surrounded she is by support,” according to the opening video text, which adds:
"We don't know exactly how much time we have left together. But what we do know is that being in present in the moment is of the utmost importance."
Watch the moving tribute below and then click through a series of other memorable flash mobs: