Assuming the original poster is at all serious, this brings to mind a saying common in the medical profession: "When you hear hoofbeats think horses not zebras."
As the OP has hopefully learned from this thread, there are an awful lot of common reasons ("horses") for radar altimeters to read spuriously or erroneously, all of them clearly explainable by the laws of physics, and such events occur often enough, at all altitudes, to make extraterrestrial causes ("zebras") extremely unlikely.
At the risk of writing the glaringly obvious, it should also go without saying that "reality" TV producers and directors are exceeding good at, and quite in the habit of, making mountains out of molehills.