Last night my wife put something down when all I heard were my two Evic mini's with their Tron tanks fall crashing and clattering to a tile floor. Luckily she missed the istick/Theorem beside them. On picking them up I was surprised to find both tanks still in one piece but one of the units would not fire as it wouldn't read the atty any more. After determining it wasn't the mods problem and it wasn't just a case of something coming loose, and having once before done the same with a Lemo 2 I knew how to fix it. The bases on many atty's are made with two or more parts press fit together. A sizable knock can jar them causing the positive pin to no longer contact the post properly. I took the atty's base off and turned it upside down on a hard flat surface. Using a socket from a tool kit so as not to damage the 510 connection on the bottom of the atty I gave it a wack with a hammer. That realigned the parts and again allowed it to make a connection. Hope this helps anyone else butter fingered enough to be dropping their vape.