The old man seemed to crumple in the middle, tottering forward.

Tottering forward he laid a quivering hand upon the man's arm.

Unable to support his own weight, he tottered forward.

He tottered forward and turned off the alarm that had called him.

This ancient one leaned heavily upon the staff and tottered forward to stand before the visitor.

An entire front of a building tottered forward and fell into the great hole that had been created, almost completely filling it in.

With a scream he tottered forward and fell into the gully.

He almost rammed into the elderly woman who tottered forward on a cane.

He tottered forward and lifted it above his head.

He reeled, then tottered forward another few yards before falling.