I've done it a few times to bevel the underside of a table top with 3" diameter cutters. The table top is clearly too large to pass over a router table so you have to take the tool to the wood.
I always clamp the table firmly, use a wide base on the router, and take very shallow passes.
Once I must have dipped the router very slightly, it caught the top and before I knew it, it had flown out of my hands, whipped through a clamp- I keep the chewed up metal as a reminder of what can happen- and the router ended up on the floor with the cutter still spinning. It was an OF1400 by the way. I have no idea how close it came to my head as it flew past.
I switched off the power, turned the lights off and left the workshop immediately to get a stiff drink. I don't know what I could have done differently to make the cut more safely, other than use hand tools.
I've repeated the cut since my near miss experience, but I am so, so careful when I do it. I've raised panels using this method, I've seen Brice's video and others, but I know what happened to me and I don't care what anyone says, it's a very dangerous technique.
Caveat emptor.