I'm sorry sir but you stood on a butterfly. Metaphorically of course. You called out to that dog. That dog barked and frightened the cat who leaped towards that window. The window cracked which meant someone had to fix the glass. A window fixer was called out to that address causing a different flow of traffic that day. This caused several people to arrive at slightly different times causing different movement in offices, towns, homes, causing a number of different effects across the country. Already we've seen different traffic reports that don't line up with the script. Flight delays are happening as we speak which means this ripple will spread across the world. Slightly changing things. Slightly changing thoughts. Slightly changing decisions. It may not feel bad right now but you changing something in here, in the yesteryear means you may never be born.