lol exactly!  I gained 15/20 pounds in college, too, right after the Army, during my adjustment period from about 2000 to 25000 kilo cals daily and some days maybe up to 3K per day (bivouacs, field exercises, etc.) to relatively sedentary campus life.  And like you I felt it immediately!  Any weight gain on my body is immediately shunted to my belly - right in the worst place -- true fucking genetics inherited from the Asian side of my fam -- all the fatties on that side have little or not-so-little pot bellies below their navels, ugh...  So I feel uncomfortable as fuck, like a little baby bump I suppose feels on a pregnant woman (never pregnant by choice), ugh, so I got busy too and reduced my caloric intake and doubled my activity by the end of my freshman year.