Well, talking about and "Skid Marks" and "Sphincter Contractions", the hairiest one I have had was at the Elliot Heads Esplanade.
It has a really noice concrete path (whether it is a foot path or a blokart path is the debate) which is maybe 3 or 400 mm wider than the blokart wheel base.
My first time at this spot and the wind was blowin' noice too, about 20 k.?
Parked Francis Fairmont (or the Silver Streak if you like) in the top end car park, emptied her boot and rigged the jig pointed into the wind which was coming from a little bit south of east ie ESE. Pretty perfect for one direction and workable for the other.
Direction I would be sailing on the first leg was a slightly windey route north as we can't let the joggers and dog walkers get bored can we?
So, secured the car, mounted the rig, pulled the sheet and it just took off. I'm hurling along having a ball when the front wheel starts jumping off the path because the mast is hitting the overhanging branches of the She Oaks planted next to the path.
Look up. OK dodge the trees by dropping the right wheel off the path and I am still hooting.
Next thing the ground drops away for a gully which is crossed by the concrete path I am on. However the crossing has posts and rails for the frail on it.
Heading for this at least 45 kmh does not allow the feint hearted time for indecision. Instant "Go for It". Rather bust a couple of wheels off than bust me 'ead.
I am still here and so are the wheels.

Statutory Warning:- "Do not try this at home or anywhere else."
P.S. The effects have worn off but I still get a tremble when I think about it.