What do you do to be safe when near a meltdown?

Last couple weeks have been very intense for me emotionally, and I noticed I was a short stress session away from snapping and doing unsafe things.

The internet didn't really help as all results were "how to calm a meltdown in autistic children" or shit like that.

I really like whistling and was at home, so I randomly did a 1 hour freestyle whistling spree which really helped, and probably annoyed my neighbours way less than loud banging noises and screaming would have. My head feels a bit light from all the intense breathing lol.

If I'm outside and have the time, I also try climbing trees or large debris, or sprint as if I'm late. I have no idea what to when in an enclosed professional space other than pretending to go to the bathroom.

What's your favourite meltdown-delaying technique?