Looks like there will be every chance of an early handshake here absent a big score from Canada soon.
On the subject of touched stones, I have found the following from Canada’s Collingwood Curling Club:
A moving stone is considered “burnt” if the delivering team touches the rock before it has come to rest. This can be a touch from a brush by the sweepers, a foot, or any piece of equipment such as a hat or glasses.
Note: if the curler delivering the rock retouches the rock after it is initially released, e.g. to try to put a curl on it or more speed, IT IS NOT CONSIDERED BURNT if the re-touch occurs before it touches the hog line.
If the moving stone is touched before it touches the far Hog line, it must be removed from play immediately. There is no other option.
If any moving stone is touched inside the far hog line at the playing end, you must let the rock come to rest. The non-offending skip has 3 options.
Let the play stand.
The burnt rock is removed from play and all other rocks affected AFTER the infraction is committed are placed as close as possible to their original position.
The non-offending skip can place all stones affected as close as possible to where they would have ended up if the infraction had not occurred.
This rule applies to all stones set in motion and not just the delivered stone.
Surprisingly complicated! I don’t recall seeing it in my quadrennial viewings but by definition these are the planet’s finest curlers so I suppose infractions are expectedly lower.
Certainly it is highly skilled but at least no helmet is required! I’d love to give it a go.