can someone give me an insight as to why this happend last night?
Too much extruded material maybe? It caused the nozzle to bump into an uneven bump which makes the Y stepper loose steps?
Also, have you inspected the gcode? Maybe the slicer failed were the problem happened?
that’s what I kinda thought, if the axis slips, wouldn’t it stay slipped. it looks like it went back on course at the top… I’m very fresh to this whole 3d printing, I really do appreciate your help and input 
It looks like printed to fast. You can cooling via fan or print slower.
Do you use z lift? It can help to avoid lumps.
hmm, i did go inside when this happened, i was not present watching like i usually do. iv contacted makergear about it, and they replied asking if my y pully is secure on the y motor,and if i changed firmware lately, it looks secure and snug, and iv only been using simplify 3d for all my software needs, seemed to slice fine. i dont know, i guess ill see what they say
z lift? @Peter_Hertel
you right… it didnt’t slip since it went back to the exact position!!
it could very well be the speed!! it went too fast on those layers which made the layer didnt stick correctly.
are you sure your Z is calibrated correctly?
I had a similar issue some time ago and the problem was my Z being off by 1mm!!
try to attach a caliper to the Z, and move it by 10mm, reset it and move 3 more times by 10mm… if you got more than 30mm, your layers are being extruded too far apart from each other!!
just make sure the caliper is perfect attach and perfect aligned with the z axis!! 
or you could try again on half speed!! 
i slowed it down and a lil slower material feed speed this time around, its printing ok so far…
oh, and i made the size between layer smaller
What kind of bot is it? The fact that it went back to the proper position indicates that it wasn’t a motor skip, but probably something pulling the extruder or platform (most likely the former) out of position temporarily. Depending on how your extruder is mounted, excess tension on the filament could explain it.
It would pull on the extruder, which is mounted to the X axis, but it would probably pull it in a direction perpendicular to the axis’s motion (which is constrained by the belt). I believe the M2’s extruder hangs out in front of the linear guide and down below it, so the extruder flexing on its mounting would be consistent with this issue.
The filament would keep flowing as long as the extruder could still pull it in. What I’m suggesting is that the resistance against pulling the filament in caused the extruder to pull itself against its mounting into a new position, until it pulled past whatever resistance it was encountering and the extruder snapped back into place.
@Anthony_Djekic_twans z lift - sometimes called hop - moves the head up/lifts/jumps as it moves from position to position.