That's because the current only travels a short distance and feels like a buzzer between the fingers.
But your body gets used to it. In the AF, I worked on a lot of equipment as a PMEL tech and got shocked once in a while. The biggest wake-up I got was 10,000 volts DC arm-to-arm. I didn't jump. The first thing I did was see if anybody saw me make THAT mistake, so they wouldn't laugh, LOL. Also did that with 400V AC triple phase. If you know there is a possibility of shock, it doesn't have any heart-stopping effect. You just feel/look stupid. It's not the shock that stops the heart, it's the surprise. You can probably do 20,000 volts DC arm-to arm as long as it is gradual and you know it's coming without any effect on your brain or bodily functions. And nobody touches you.
Voltage never killed anyone, it's the amperage!
I shorted out a 480 3 phase panel one time when I was trying to pull off 220 single with alegator clips for a welder (thought it was 220 3 phase) and it blew a fireball out that knocked me back 10 feet, burned all the hair off my head and the skin off my face and I was totally blind for about 20 minutes, that was a real shocker. It also knocked out all the power in the Lawry Foods Plant that we were working on.