Throwing an ebike is pretty impressive cause they're big and bulky. A regular road bike isn't too bad... hard to get a lot of distance, but you can toss them a bit. Rolling them is easier, if you push hard enough and they're reasonably balanced you'll get some good distance before they fall over.

At most, this was rolling it into traffic, but my view is he had a hand on the handlebar until right around the collision, so he was just walking with his bike.

But WTF is that traffic configuration? Why are people trying to drive through that lane in the wrong direction? Seems like a good way to get a head-on with a car in addition to pedestrians that weren't expecting a wrong way driver.

Vehicle operators usually have a duty not to proceed unless safe, even when they have right of way, I'm not sure how much that duty applies to pedestrians or if natural consequences is enough.