NOT a motorcycling experience, but . . . it COULD have been! "What if," arises.
Following (in my, "cage") a pickup truck on a ramp leading to an Interstate highway . . . suddenly, a mattress, laid flat into the pickup bed with the tailgate closed, ROSE OUT of the bed completely, and landed on the pavement immediately in front of my vehicle! A, "Jersey barrier" (concrete barricade) was on my left, and merging traffic coming from the right, I had no choice other than . . . running over the mattress. Sorry about that, dude.
Upon analysis, I believe LIFT from the air moving over the bed (Bernoulli effect) levitated the mattress, flinging it to the roadbed. Next time, I hope the driver snubs down his mattress adequately, if he's driving at any speed at all.
Now: WHAT would/should I have done, if this mattress had landed in front of the leading wheel of my motorcycle? What would you do?
I once helped a guy move a very large dog house. I'd estimate it was 3 feet wide, 4 feet long and 4 feet high; a very well-made affair and I'm guessing close to 200 pounds. It was not easy for us to lift into the back of the guy's pickup. Considering how much effort we had to expend to get it into the truck, we didn't think much of it and just put it in with the door facing foward, well toward the front of the bed.
We'd gone a few miles and were driving around 55 mph on a 2-lane blacktop road when we suddenly saw the thing fly out of the back. It actually flew up and over the tailgate, doing some damage to the gate. Having logged many miles in the open bed of a pickup myself, I was amazed that the air could catch and lift something that heavy.
The doghouse was sheathed in metal siding and landed on one side and just slid down the road until it stopped.
As noted by Damocles, Bernoulli's Principle is nothing to mess with. If it can get a C-5 Galaxy off the ground, I guess it can lift a 200-lb. doghouse at 55mph.................