It was me who did the test a few weeks ago. I was equally surprised to see that nothing bad would happen, regardless how hard I tried.
Whether to simply let the nose drop of its own accord, or to use a 1/2G pushover, or a 0G pushover all didn't matter. I was fully established in a Vbg glide *before* any altitude loss would occur.
The only thing that could conceivably considered "bad" was when I deliberately tried to maintain the attitude and let the aircraft stall. That lead to a loss of about 400 feet before being established in a stable Vbg glide. But it took three to four seconds from loss-of-power to the stall, so you should have plenty time to think "oh ****".
What did not work at all was simply releasing the stick and let the aircraft sort itself out. After having lost well over 1000 feet in a speed/attitude oscillation I called it quits.