It's a strange feeling when you see your altimeter display a negative altitude! LOL!
I was at -20 meters (or negative 65 feet) for a good portion of my flight and was up as high as over 45 meters (almost 149 feet).
By the way, as a new pilot, I'm attempting to build up my YouTube channel...
Watch as a swarm of bees are attacking my drone, 40 meters in the air!
My drone (DJI Phantom 4) survived unscathed, except for some blood and guts on the fuselage, battery, and propellers—that were easily wiped clean.