Introducing new people into our adventures is not usually difficult, first, they have a sled that can go, or they don't.
Jeff did, sort of.
The hard part is getting folks to want to go again!

Here is half of Jeff's sled,
He was following me, and as Sean told him later, that is not a good idea.
This hole snuck up on me and I was running out of choices, so I jumped off the steep bank and bounced my sled up onto the opposite bank, Jeff was right behind me and I suppose he figgured I knew what I was doing!
so he jumped in as well.
I had broken the Ice when I hit so he did not have the advantage of something hard to bounce on, his skis hit the bank on the other side and...
It took all three of us to yard the thing out of the hole, Jeff squished as much water out of the seat as he could, Jumped on and was ready for the next thing.

Sean and I scouted this river crossing, checking the entry and exits, trying the run and generally picking the safest environment for the new sled to see how she could do.
Here Sean is just coming back across.

As seems to be the case, Jeff was winding her up to give her a go, when suddenly he lost spark in one cylinder.
Sleds tend to act that way when they get afraid. I know I have had sleds conk out just at the wrong time myself. They can't help it, They just get all worked up and it's a natural response for them to just freeze.
They loose all concern for the rider, their only thought being to save themselves.
Jeff made a gallant effort to encourage his sled as far as she would go, but in the end we all know you cannot skip water on one cylinder. It's against the rules.