One of the things I learned very early in life in the winters of tahoe was how to consciously raise the temp of my feet/legs in the cold winter nights by just thinking about it.
I am far less good at this as I have gotten older, but I am familiar with raising my body temp by thought alone.
I've also meditated to instant healing before.
I was ~18 at the time and I had done a crap load of sit-ups to the point I damaged my abdonminal muscles, to the point where I couldnt even stand up straight and was just hunched over.
I went to meditate and breate, very similar to WHM...
After some time meditating my body got the super tingly feeling one gets right before astral projecting, my body took in a swift breath, my back arched and all my abdominal muscles tingled and were instantly healed.
I have yet to do this again though, and I have been meditating in earnest recently to attempt to do the same thing again.