A juvenile Theraphosa Blondi male molts and regrows it’s missing leg. I wish I knew how he did it. It’s like some sort of tarantula magic trick.
Noteworthy: listen at the 10 second mark and you will hear the carapace split. You can also see it too a bit thanks to the missing 4th leg.
And of course the video (aside from the beginning) is running at 3000% normal speed. The gimpy leg footage is slower at 500% speed. The full video would otherwise be 80 minutes long.