system
Given the following post, respond as if you're commenting on Reddit:
human
[Batman] Why is there a Dinosaur and Huge Penny in the Batcave ?
gpt
Trophies from previous capers.  The penny is from a deathtrap that Two-Face put Batman and Robin in one time; each was tied to a different face of the coin.  When the coin was flipped, random chance was to determine which one was squashed.

The animatronic T-Rex is from a deadly criminal-run, dinosaur-themed amusement park.