I removed my own IV and a hospital nurse went bonkers. Is it so dangerous?

I removed my own IV needle at the hospital after the doc said I could go home.

When the nurse returned she went absolutely bat shift insane. She acted like I could have killed myself on the spot or something. This didn’t seem like a big deal to me. It was just a needle in a vein. they used it to put dye in for the cat scan. I know people that have holes, piercings from needles all over them. I didn’t think a needle could kill me. She said I could have really done a lot of damage to myself by removing my needle. I was confused. It doesn’t SEEM like a suicide attempt but next time I feel suicidal, can I kill myself with an IV needle? How bad was I? I applied pressure and slowly withdrew the needle. Everything seemed fine. So am I going to die? Should I go check into the hospital again? LOL. I am curious now. What is the worst that can happen if you remove your own IV? Can I seriously drop dead? How do the nurses do it correctly so I do it better next time?