I am having a similar problem on ps3 at the anal probe sequence, button mashing is not working, and its been 5 days since I've reached to and no one has gotten back to me. its a shame.
I just beat Jimmy the Bard and went home to sleep. I'm stuck at the part where (spoiler ahead) the aliens are trying to ram the black **** up my ass. I mash x as fast as possible i cant get anywhere over 75% of the bar full. Im going crazy trying to get it. I have adjusted the settings to casual and i still can not mash fast enough. What can I do to beat this? I need help I'm losing my mind!!!!!