[caww]

....” That should be an awfully safe ride”....

I've never seen any “vehicle” where you have to ‘balance’ between two rolling wheels a ‘safe’ ride. Put 20 bicycle riders together balancing their wheels isn't exactly the way to safely travel on an open highway.

[Blue Jays]

"...isn't exactly the way to safely travel..."

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It was a open, straight, clear road during daylight hours with riders undoubtedly wearing bright colors and ubiquitous strobes.
The fatalities were caused by a speeding DUI driver, blasted on meth, who smashed his truck into other lawful road users.

[sphinx]

I've never seen any “vehicle” where you have to ‘balance’ between two rolling wheels a ‘safe’ ride.

Actually, it's not hard if you've over the age of five and sober.

[cyclotic]

The thousands of miles in which I’ve done just that will disagree with you