What happens when matter collides with antimatter? Annihilation.
That's what I thought was going to happen a few weeks ago when I took my wife grocery shopping. My wife has some mobility problems, some days worse than others, so I took her grocery shopping, just to push the cart around while she shopped.
As we're shopping, my wife is in front, I'm trailing with the shopping cart and this woman in front of my wife smiles and waves at me.
Arooga. Arooga. Battles stations. This is not a drill.
In this scenario, my wife is antimatter, and anti-CD. The other woman is matter and pro-CD. In fact, she is the owner of the women's clothing consignment stare that I patronise frequently.
A collision between matter and antimatter was imminent. The woman who sells me dresses and the woman who doesn't know that I wear dresses were 10 ft apart and closing. Fortunately the owner of the consignment store figured out what was happening (probably because of the look on my face) and maneuvered to avoid collision and subsequent annihilation. Lucky for me.
As an engineer, I usually identify and assess failure scenarios and develop plans to mitigate the fallout. This specific scenario was not in my playbook.