Per the article, Eichenwald spent a lot of his time in college in an epilepsy-induced amnesiac haze. So much so his fellow students named his epilepsy Michael -- as in, "Michael's been around a lot today."
With medication, he eventually got it down to partial seizures. That can be as mild as zoning out for a minute or feeling dizzy. But if it's Temporal Lobe Epilepsy, partial seizures can sometimes mean acting really weird and inappropriate for a few minutes, like falling down on all fours and humping the couch or whipping out your dick at a faculty meeting. TLE would explain a lot.