What happend?

Okay so i was on a minecraft world and i was building in minecraft and making a video somthing cought my eye it was a pit of lava and so we built somwhere else and i came back to get some lava and it was gone, i started looking around then the game crashed. After i looked at the recording and saw as i was turning to leave i saw somthing on a tree it was an all white figure with waht seemed to be black eyes and it happend again right beafor i crashed so i thought it was strange and so searched up minecraft white figure, and to my surprise there where a cuple images of white figures