i was thinking when they wake up you could play a program of a dinosaur chasing them and see how they react or could do other confusing things to them
The Japanese are already using the Rift for porn. Your little prank cannot trump that. Also your pkan would work the same if it was dark and you wore a scary 50 buck costume instead of paying 300 dollars for Rift that might end up being thrown into a wall.
There is this breast squeezing game http://www.independent.co.uk/life-style/gadgets-and-tech/japanese-developer-creates-virtual-breastsqueezing-game-for-the-oculus-rift-9728740.html And this game you pretend to have sex in https://www.google.com/url?sa=t&source=web&rct=j&ei=dWBvVKXMA8WwggSX8IKIBA&url=http://kotaku.com/elaborate-pc-demo-allows-for-virtual-sex-robot-handjob-1462645304&ved=0CB8QFjAA&usg=AFQjCNEE1ZOtZNSohuMj1ZkBh0u07g9WaQ&sig2=-Rs-eZuTh6CNRoMgx9K7Ug