Casey nervously undid a shoelace, retieing it with meticulous care.
You can thank your lucky stars that your shoelace came untied.
While Urquhart was playing his shoelace became loosened, and he stooped to tie it.
Rick balanced on one leg, one hand on Scotty's shoulder, the other hand fumbling with the shoelace on his lifted foot.
She moved impatiently, so that the shoelace ...