Scary. Yes this is dangerous. You were lucky that the pilot was able to get enough power (barely) to get up again--usually once a plane is just above the tarmac prior to touchdown, it's committed and too late to power up again and execute successful go-around. Possibly he got crosswinded or was experiencing microburst at the critical moment. Possibly he was coming in too fast and realized it at the last minute. Count your blessings and hug your kids tighter tonight.

Sometimes the forums of pprune.org will have mention of these sorts of non-casualty incidents (as well as actual crashes), but it may take several days to come up (or not).