THE MIND...
29. *Biodiverse ecological layer: RAINFOREST CANOPY
49. *Lost control of one's emotions: FLEW OFF THE HANDLE
And Away We Go~!
ACROSS:
1. Coastal country with approximately a quarter of Africa's gorillas: GABON - I recall "Survivor" had a season there
6. "Huh, really?": "THAT SO~?"
12. Panda car driver: COP - I did not know this is a British term, despite having parents born & raised in England, but it makes sense; black & white . . . . the Wiki
15. The "A" of the ABC islands: ARUBA - the others being Bonaire and CuraƧao
16. Become less intense: EASE UP
17. Singer DiFranco: ANI - name #1
20. Slump: SAG
21. Skedaddles: SCOOTS
22. Fish out of water: MISFITS - semi-meh. FishES would have helped
24. Data unit: BYTE
26. "A little assistance here!": "HELP~!"
34. Irene who matched wits with Holmes: ADLER - #2; I did not know this character
35. Eateries that might have 1950s decor: DINERS
36. Actress Gadot: GAL - #3; I am getting used to seeing her in crosswords now
37. Apple platform: iOS
40. Foot part: TOE
41. Arthur of "The Golden Girls": BEA - #4, crossword staple
44. "You're making me blush!": "STOP IT~!"
47. Sacred song: PSALM
54. Actress Chaplin: OONA - #5 - her IMDb
55. Phone message: TEXT
56. Genesis garden: EDEN
57. Suitcases: LUGGAGE
61. Gutter ball preventer: BUMPER
63. Genetic material: DNA - abbr#2
68. Common breakfast ingredient: EGG
69. Hearty: ROBUST
70. Loads (of): SCADS
71. Poor grade: DEE
72. Real estate and the like: ASSETS
73. "Aw, shucks": "OH MAN..."
DOWN:
1. "Eww!": GAG
2. "__ you nuts?": ARE
3. "And yet ... ": BUT STILL...
4. More than a little indecent: OBSCENE - "the words he knows are all obscene, but . . . "
5. Brussels-based gp.: NATO - Wed-level crossword clue - abbr#3
6. Wobble: TEETER - good WAG on my part
7. Pestered: HASSLED - but ANNOYED was not
8. Volcanic residue: ASH
9. United group: TEAM
10. Certain Muslim: SUFI
11. Makes a selection: OPTS - meh. chooses is better
12. Vegas venue: CASINO - I have ZERO desire to go to Las Vegas, other than to see the architecture
13. How some bet: ON A TIP - Dah~! Not ONLINE
14. Spot that isn't spotless: PIG STY
19. Hostess brand: HoHo - meh. I don't like this clue; isn't it a "product", not a brand~?
23. Snorkeler's footwear: FINS - how goes the swimming, C.C.~?
24. Boast: BRAG
25. When repeated, "Blah, blah, blah" kin: YADA - the "Elaine-ism" from Seinfeld
27. Trident-shaped letter: PSI
30. __ pie: dish with corn chips: FRITO - does make sense; we called it "Dip" in Cincinnati
31. Explosive letters: TNT - two blogs in a row for me; abbr#5
32. Corp. suit: CEO - ah; 'suit' meaning the 'person' in the position; the term for this is "metonymy" - and abbr#6
33. Colombian street snack: AREPA
38. "Sounds painful!": "OOF~!"
39. UV-filtering measurement: SPF - Sun Protection Factor - for UV "B" rays, and abbr#7
41. Nightmare: BAD DREAM
42. Fanning of "Super 8": ELLE - #5, More from her IMDb page
43. Prayer ending: AMEN
44. Branded totes and pens, e.g.: SWAG - I am quietly wondering if I will ever get invited to the Pipe Organ convention, and see what swag they are offering. . . .
45. Hairy Addams cousin: ITT - duh-duh-duh dun....snick - snick - #6
46. Tina Turner's signature song: THE BEST - I can think of others that are "BETTER"
48. Star-bellied Dr. Seuss creature: SNEETCH - I've never heard of these guys, #7
49. Practiced origami: FOLDED - practiced POKER, too
50. Upscale waiting area in an airport: LOUNGE - total WAG
51. Take part (in): ENGAGE
53. Web design code: HTML - abbr#8
58. Supernatural glow: AURA
59. Engineered foods, for short: GMOs - Genetically Modified Organisms, abbr#9
60. Subsides: EBBS
62. El __, Texas: PASO
65. Regret: RUE
66. Dietary amt.: RDA - abbr#10
67. Early AOL rival: MSN - MicroSoft Network - abbr#11
Splynter