I think he was one of the few guys who went out on stickers, and just didn't have enough grip. He managed to get a few laps in with his backup car.
As for Happy Hour, here are the final speeds. Your boy is looking good.
1. (1) Steve Park, Chevrolet, 171.135
2. (48) Jimmie Johnson, Chevrolet, 170.967
3. (24) Jeff Gordon, Chevrolet, 170.837
4. (25) Joe Nemechek, Chevrolet, 170.719
5. (22) Ward Burton, Dodge, 170.692
6. (44) Jerry Nadeau, Dodge, 170.331
7. (97) Kurt Busch, Ford, 170.245
8. (15) Michael Waltrip, Chevrolet, 170.234
9. (2) Rusty Wallace, Ford, 170.170
10. (8) Dale Earnhardt Jr., Chevrolet, 170.025
11. (7) Casey Atwood, Dodge, 170.025
12. (77) Dave Blaney, Ford, 169.982
13. (40) Sterling Marlin, Dodge, 169.902
14. (29) Kevin Harvick, Chevrolet, 169.875
15. (5) Terry Labonte, Chevrolet, 169.859
16. (12) Ryan Newman, Ford, 169.849
17. (43) John Andretti, Dodge, 169.785
18. (9) Bill Elliott, Dodge, 169.779
19. (20) Tony Stewart, Pontiac, 169.715
20. (19) Jeremy Mayfield, Dodge, 169.694
21. (10) Johnny Benson, Pontiac, 169.555
22. (99) Jeff Burton, Ford, 169.348
23. (26) Todd Bodine, Ford, 169.306
24. (55) Greg Biffle, Chevrolet, 169.030
25. (21) Elliott Sadler, Ford, 168.903
26. (88) Dale Jarrett, Ford, 168.893
27. (36) Ken Schrader, Pontiac, 168.697
28. (32) Ricky Craven, Ford, 168.487
29. (23) Kenny Wallace, Dodge, 168.418
30. (6) Mark Martin, Ford, 168.418
31. (17) Matt Kenseth, Ford, 168.329
32. (41) Jimmy Spencer, Dodge, 168.271
33. (45) Kyle Petty, Dodge, 168.120
34. (30) Jeff Green, Chevrolet, 168.120
35. (31) Robby Gordon, Chevrolet, 167.717
36. (28) Ricky Rudd, Ford, 167.541
37. (18) Bobby Labonte, Pontiac, 167.483
38. (74) Tony Raines, Chevrolet, 167.463
39. (14) Mike Wallace, Pontiac, 167.426
40. (4) Mike Skinner, Chevrolet, 167.421
41. (60) Jack Sprague, Chevrolet, 167.411
42. (49) Stuart Kirby, Dodge, 166.868
43. (89) Morgan Shepherd, Ford, 164.885