REALLY BIG MISTAKES

There are some things you should never attempt to do regardless of your bravery.  The biggest is if you insist on getting a tattoo when former medical doctor and scientist turned homeless vagrant is employed and on duty, don't tease the guy.  If you tease and bully David Bruce Banner when he's carving a tattoo into your back, arms or legs with a tattoo pen, you're going to end up being stabbed to death in several places with that tattoo pen when David Bruce Banner turns into the Incredible Hulk while still trying to carve a tattoo into your skin.  Trust me when I say that the end result will be very messy.  Not even plastic surgery will fix the resulting damage to your body when the Incredible Hulk attacks you with a tattoo pen against your skin several times. 
As I think about lonely angry people who throw self destructive temper tantrums all the way down to homeless vagrancy, here is a photo of Mary Kate Olsen.

Here are some photos of Ashley Olsen.