[Sohcahtoa82]

I've always wanted to see someone encode/decode Base64 in their head.

At best, I've learned to recognize a base64 string that begins with "eyJ" is likely JSON.

Also, if you asked me what the base64 encoding of "password" is, but if you showed me "cGFzc3dvcmQ=" and asked me what the decoded value is, I'd recognize it as "password". Though you could probably change a few digits and fool me.