Walking on the clouds, suspended in thin air
That purple flower he is burning has him really high..
This line is also a metaphor for being fly. Since he’s above other rapper (metaphorically, and in this case literally), they see the bottoms of his shoes (thus the next line)
To help improve the meaning of these lyrics, visit “I'm On One” by DJ Khaled (Ft. Drake, Lil Wayne & Rick Ross) Lyrics and leave a comment on the lyrics box