Maniac Mansion: Day of the Tentacle/End

Meet with Purple Tentacle
Once you will be chased by Purple Tentacle, exit the lab and go over to the first floor on the side of the motel. Open the middle door to get shrunk Purple Tentacle. You must quickly enter Dwayne's room and walk through the mouse hole to enter Green's room. Wait the characters until large; pick up the bowling ball on the table. Leave and the Purple Tentacle will disappear(!). Descend back to the lab and use the bowling ball to throw ten tentacles. After ten tentacles are hit, the Purple Tentacle will appear. Talk to him and ask about "Just what is it you have against humans, anyway?" to complete the game.