Is it possible to gain weight THIS fast?

MaxRocks
Okay I've been asking questions herelately regarding my weight-gainning diet that I started Monday. It's quite frustating at times and a bit repetitive and expensive, but anyways...

Before starting it, on Monday's morning, I weighted myself: 60.4kg. Since then I've been eating 2700-3000cals/day and just now, before my mid-afternoon snack, I went to weight myself again: 61.5!!! That's a 2lbs increase in 48 hours wth!!! I was expecting 1 or 2 lbs per WEEK.
Well anyways I was stunned but had my 600cals snack and when I came back the scale was strange (probably because I had just eaten). It showed 61.6 and then when I tried again it began flashing between 61.6 and 61.8 and it started giving me either one of those 2.

But even assuming the.2kg error margin it's still a gain of 1.5-2lbs in roughly 2 days. Just wth is this even possible?
Oh by the way if this is possible but is unhealthy somehow, idc ^^ I'm not eating any empty cals and as soon as I get to 75kg (which at this pace will be pretty soon) I'll cut down right away to 2000cals again just to mantain them.

Thanks everyone for answering in advance,
Updates
+1 y
Ohh yes I always weighted with underwear on only so clothes (even socks) are not to blame
Is it possible to gain weight THIS fast?
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