Trans-cranial magnetic stimulation (TMS) is weird. The generated magnetic field has to reach the prefrontal cortex by going through the same area as some motor nerves, so there's some involuntary muscle action. Here's one picture of me in the rig between pulses, and one during a pulse.
https://awoo.space/media/__j19KnEgueG7gT9MKM https://awoo.space/media/hpehI-NQ79uYOa-YW8c
@ElectricKeet the Kirby hat being tilted to the side really makes those photos!