It is better to know about a danger beforehand rather than later on when it is too late and your lizard messes you up physically.
I had a 5’ green iguana which is an%80 vegetarian diet, so not even a predatory type lizard. I took it outside on a hot day to bask in the sun, on a leash and halter (which I would never recommend for any lizard with spines). I had read before this day that when you let your herps outside they can become even more aggressive than typical because it makes them feel wild again.
I had left her alone for about an hour in the sun, then I returned to bring her inside. Not even paying attention to the fact I could have startled her, I reached for her and bam, she nailed me with her tail. She just barely nicked me but it was straight up the middle knuckle bone of my hand and arm. Deadly accurate and just shy of breaking skin.
I had a friend do the same when he approached a wild iggy on his honeymoon, but he wasn’t so lucky. The tail shredded his arm up so bad, that you could see inside, bones and muscles and whatnot. I almost passed out when I realized it wasn’t a fake photograph.
Now imagine that these responses are a defensive mechanism for a vegetarian animal. Now imagine the Nile monitor is an aggressive predator which depends on killing to survive (typically). That freaks me out personally, just saying.
Good luck and we really like pics. So please share pics.