When the hundreds of Reanimen failed to contain Invincible, Cecil Stedman used his final contingency against Invincible. Turns out the communication earpiece that Cecil gave Invincible can also be used as a weapon. It blasts pulse into his ear, upsetting his equilibrium. Invincible had to fly really fast to get out of Cecil’s range to tune out the pulse, but then Cecil uses his teleportation gadget to catch up.
From – Invincible #50