For only five seconds out of my now 84-year lifetime, I witnessed a UFO sinking into another dimension to sidestep our known laws of physics. I observed a bright, audible airplane-sized machine when it faded out and then silently shot to the Earth at Mach 1 without friction or inertia. It looked like a Looney Tunes cartoon as it dove.
Robert L. Schroeder explains my 2014 UFO in his book — Solving the UFO Enigma: How Modern Physics is Revealing the Technology of UFOs. Please read it to know what UFOs are and how they may operate.