https://en.wikipedia.org/wiki/Signal_for_Help

Did you know? – source Wikipedia 

The Signal for Help (or the Violence at Home Signal for Help)
is a single-handed gesture that can be used by an individual to alert others that
they feel threatened and need help over a video call, or in-person. It was originally
created as a tool to combat the rise in domestic violence cases around the world
as a result of the self-isolation measures related to the COVID-19 pandemic.

The signal is performed by holding your hand up with your
thumb tucked into your palm, then folding your fingers down, symbolically
trapping your thumb in your fingers. It was intentionally designed as a single
continuous hand movement, rather than a sign held in one position, that could be
made easily visible.

The Signal for Help was first introduced in Canada by the Canadian
Women’s Foundation and in the United States by the Women’s Funding Network
(WFN) in April 2020. It received widespread praise from local, national, and
international news organizations for helping provide a modern solution to the issue
of a rise in domestic violence cases. The signal has been recognized by over 40
organizations across Canada and the United States as a useful tool to help
combat domestic violence.

Addressing concerns that abusers may become aware of such a
widespread online initiative, the Canadian Women’s Foundation and other
organizations clarified that this signal is not “something that’s going to
save the day,” but rather a tool someone could use to get help.
Instructions for what to do if an individual sees the signal, and how to
check-in safely, were also created.

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I never heard of this.

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