omg blood!

Today I learned that roughly 50% of my arms are totally useless when it comes to donating blood.
I was asked to go outside, drink something, then come back to try the other arm, which worked just fine.
Took a little longer in the end than I expected though.
Anyway, not a problem. It's 4pm now, and I'm back home, and in about an hour, I'll leave for work ...