Someone cancelled today and I got their appt!

After exam my Neuro ordered another round of ACHR testing as well as the MUSK test from Mayo clinic. I'm waiting for a call for the EMG appointment.

He said "you're not going to like me very much after this test". I've had these done in my legs and it was very unpleasant but this is done around my eye?

Can someone tell me of their experience with this test? Lord knows I'm no novice when it comes to needles but just how painful is this?