Murphy and RnD exploison bug

[RAP]

Around 0:47 and 0:50, you will see murphy (the player controling) running
away from a exploison, one of the graphical exploisons turn into RnD exploisons.

Heres a level and tape that came from a abondaned level that I had...
http://www.zomis.net/rnd/download.php?id=519