You were in the Nuco hangout area. There were many of these strange beings named "Nuco", they are inter-dimensional beings who are canon in any game, series, show, etc. as long as a character is wearing green or green is present.

You somehow trip over into a smol, chibi Nuco.

"AH-!! WATCH IT!" He said rather aggressively. After all, he was 18 years old, just like any other Nuco, just a bit over 10 centimeters.