done about 80 pins, had it twice, one in the glute, it was about a 2/10 on the suck meter, being the 2nd time I was ready, knew when I started plunging I hit a vein, just kept going. 1st time it was delt, hit hard, like 6/10. Still, nothing too bad, like having a cold and getting hit real hard in the ribs, ok both sides.