Today I learned I have a rare superpower, the ability to give myself goosebumps on command without an external trigger like cold or fear.

It's called, pause for effect...

Voluntarily Generated Piloerection (VGP)

You're welcome. 😂

In all seriousness, this has the same effect on heart rate as vagus nerve stimulation. When my fight-or-flight response is peaked on overdrive neither have any effect but if I can medicinally (turns out regular antihistamines are good right now) tap on the breaks, both VGS and VGP can lower my heart rate. Watching the live HR reading on my Garmin as I do either is trippy!

I've always been able to do this — I thought everyone could — but didn't know about the HR connection until literally the last week or so.