Roger, I got to thinking about that in the middle of the night--and of course--only by popping balloons, or it may have been an unintentional landing: From the Guardian:
"Kevin Knapp, speaking from the command centre overseeing Trappe's flight, told Aero News Network, the cluster balloon was never able to achieve a stable altitude and developed a yo-yo effect – rapid descents with the aircraft hitting the surface of the water, followed by rapid ascents to altitudes as high as 21,000ft or more.
Knapp told other news outlets: "I can confirm that Jonathan was forced to abandon the planned flight at around 18.30 EST. Thankfully he is safe and well and currently making preparations to get home."
