To the OP.. Woah... looks you had a case of me... only at higher RPM.. ( i was sitting at idle). "DID NO ONE READ MY POSTS ABOUT NOT BUYING A SINGLE BOLT CAM!!!!"

I was the "the other guy" someone posted pics of an my cam pin that broke off) What happens on single bolt camshafts (or at least in my case) was when the pin broke the cam spun 90 somthing degrees advance.. soo on our cars the rotating assembly turns clockwise, which happens to be also righty tighty.. welllllll.... when the cam spun after the pin broke the bolt tightened up on the cam again causing the cam to rotate out of sync with the crank.. we all know what happens next (interference) with everything.. Lifters, Pushrods, Pistons, Valves, Cam lobes, you name it's toast.. you get the point.. i'm guessing the reason your lifter is stuck in the lifter bore is is because the one of the cam lobes smacked the side of the lifter at the same time your piston hit the valve causing the lifter roller assembly to get lodged in the bore...
So hugger... here's the good news.. you get to build it bigger and better than before.. here's the bad news... it's gonna cost some money

!!! If your cam gear looks like mine you need to call comp and demand they replace the Cam with a "Cam of your choosing", 3 bolt this time. I talked to "red" from the warranty department (he is the warranty manager at comp).
I'm sorry this happened to you... I know that sickening feeling you have in your gut when this stuff happens.. if you have any questions... anyone let'em fly..
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2010 RJT SS
Port and Polished, Milled .005 Heads
Patriot Valve Springs, Titanium Retainers&locks
Manley Race Valves
Comp Chromoly push-rods
Ported T/B
DT Headers, JBA H/F Catted mid pipes
Magna Flow Comp series exhaust w/ Xpipe
Comp Custom grind Cam
Tune and Machine work done by MPC
CAI Intake