My friend and I finally figured out how to rebuild a Dreamcast iso so we had some fun swapping scenes around. Don't remember this one (EV00B3) though.
I decompressed the entire set of EV0XXX.PRS files with prsdec and glanced at the subtitles in a hex editor to put together a list of what's in each one, which can be found here: http://www.mediafire.com/view/tsrblen2tev5abb/SA1_Scene_List.txt Lots of Pre-s and Post-s in it but oh well.
(Also if you're wondering, the door doesn't open because the scene was swapped with Gamma's intro and Eggman's voice sounds slightly off due to lag)
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This article pertains to the beta elements from Sonic Adventure and its remake Sonic Adventure...