Piston pin bad ?

You may be okay,, depending on if whatever it swallowed damaged any valve seats..

Find any foreign objects..

I was changing a starter drive outta my hemi,, the circlip on the starter shaft flew off, and bounced off a few things in the shop,, I couldn't find it,, so got another,, The next Sat I put in the starter, fired my car up to go to the track, and found the clip.. It had gone kitty corner across my shop,, and down one of my four bbls,, into a cylinder,, AND another cyl.. never found any pieces, but lots of impressions, and just had to touch up the valve seats,,

hope you're that lucky..