Texas Tech security didn't have to worry about fans invading the football field on Thursday night -- but they did have to deal with an opossum storming the pitch ... and the animal was sure pissed off when guards wouldn't let it continue its jaunt.
The wild scene played out at the end of the first quarter of the Red Raiders' game against TCU in Lubbock, Texas ... when an opossum somehow broke into Jones AT&T Stadium and made its way onto the field.
Broadcast cameras showed the marsupial got to the 15-yard line ... before security went to chase it down so play could resume.