Every 4th of July in the USA, we celebrate our freedom and thank our veterans by waiting until it gets dark, then setting off explosives which are likely to trigger their PTSD.
Edit: I know not every veteran has PTSD, but it would have taken longer to type "...which are likely to trigger the PTSD of those veterans who have seen combat and show signs of PTSD." I'm a lazy American.
Another edit: I also know that the sole purpose of the 4th isn't to celebrate veterans, but I've seen a lot of that on every 4th that I've been alive for. I'm getting downvoted in my comments for explaining myself, but there it is.
(WP) Make me emotionally attached to a chair