I'll try and define it from a GA viewpoint:
Once, long ago, outbound from Cap Gris Nez in a Cessna Aerobat. Flashing shadow over the roof windows and pressure wave causing the spamcan to drop down a few feet. Slowly turn to passenger who, white-faced, was doing similar to me. "Sheetohgodalmighty", let out in a single breath from him. "jesuswept" in similar fashion from me.
Silence until well over mid-channel then uncontrolled babbling from both of us.
That's a near (hit) miss.