I've been working on an idea to lighten the mood when traffic accidents occur. Nothing sours the situation more than getting punched by an angry person with whom you have just collided at speed. I think the whole mood can be de-escalated by the addition of a proximity-triggered klaxon fitted behind the front grill that can scream "YeeeeeeeeeHaaaaaaaa!" as you swan into a Smart car or someone's BMW and give everyone's airbags and seat-belts a good work-out. I got the idea after listening to I Want My Baby Back from Kenny Everett's World's Worst Record.
[Rosie] Time spent watching overloaded cranes falling over or trucks drive under an overhead obstruction with the bed raised is not deducted form one's life span. In fact, I encourage such behaviour if only to counter those times spent trying to get a human being to intervene 'twixt you and the government (eg to sell you a new road tax disc) after which one tends to sag against the nearest bar and utter such truisms as "there's four hours I'll never get back".