[iRyan]

I agree with ILoveTRW's list but would also add:

-Tonya going crazy and throwing all of Beth's luggage and clothes off the roof and into the pool (RW/RR Inferno 2)
-Melissa having a threesome with Mike and a random waitress (Real World Miami) [it sounds somewhat tame now but at the time nothing else like that had happened on tv and it was super outrageous]
-Dick trying to burn Jen with his cigarette and pour tea on her (Big Brother 8 US)
-Sam masturbating in a cardboard box during the task (Big Brother 6 UK)
-Every fight that's happened on Bad Girls club basically.
-Pumpkin spitting on New York (Flavor of Love)
-All the girls physicallly attacking New York (Flavor of Love 2 Reunion)
-Josh attacking Amanda and telling to kill herself like her dad did (Big Brother 9 US) [he made some of the most horrid and hurtful comments i've seen on a reality tv show]