Ants go Marching

Millions of feet had followed the trail before him. Pounded their scent across this path. There was no way he could get lost. None. So why was he so afraid? There were no giant feet ready to step out and squash him. The wind was down. A looming leaf wasn’t about to come soaring from the heavens to drag him off the trail. Still, something felt off.
His antennae flickered. His body quivered. There was something wrong with this trail. But there was nothing he could see!
“Get a move on!” One of his thousand brothers shoved from behind.
“Yeah, c’mon. We’ve got work to do.”
He put one foot forward.
And slid it back.
He put another foot forward, and slid it back.
“Enough blocking the path!” Came a shout behind him.
“I can’t, I just can’t.” He mumbled under his breath.
“Just go around him already!”
One brave brother set out feelers and walked calmly around him, before stepping back on the path. One by one, all one thousand of his brother’s stepped around him, following the minor detour.
Detour? He was the problem with the path!