If you mean what you can do to prevent your own panic attacks - I know of a number of people who have massage rings (aka therapy rings) and massage balls. When they feel a panic attack coming, they will use them by for example squeezing the massage ball pretty hard so it causes a slight amount of pain, and that has a similar effect. As @[email protected] mentioned, the goal is to shift your attention from the panic attack.
Also, since panic attacks are often coupled with hyperventilation, the breathing into a bag trick isn’t some TV trope, it actually works. I had to drive a friend of mine to the hospital for a severe panic attack and they did the bag thing, and I was blown away by how quickly she stopped hyperventilating and calmed down.
Berlin has even started making announcements about it: “Please mind others and keep your music, tiktoks and phone calls in your ear instead of playing them through your loudspeaker”.
The German version holds back a little less: “…music, tiktoks and calls belong in your ear and not played over your speaker”.