Banjo Kazooie Mad Monster Mansion Easter Egg

A long time ago when I was playing Banjo Kazooie, I went into the Mumbo hut in Mad Monster Mansion. When I tried transforming into the pumpkin, Mumbo said "I have a special treat, you get turned into dinosaur" Or something along the lines of that. Right as you are floating in the air, Mumbo floats you back down to the ground and says that he will save the dinosaur transformation for the next game. (Which he indeed did, but Wumba did the transformation)

I was looking up any other instances of this on google but I couldn't find any and I was wondering if anyone here has discovered this easter egg?