ORLANDO, Fla. -- Some carefully placed dynamite will soon spell an end to a downtown Orlando parking garage. Crews were packing the fire power Wednesday that will help make room for the new I-4 408 flyover.

Workers are gingerly laying explosives throughout the old garage. With the push of a button on Saturday, the building will turn into big pile of rubble. Nearly 550 sticks of dynamite will be used to bring down the old OUC garage.

"Just like knocking your legs out, gravity takes over and you fall down. Same thing here. Just gonna knock down that ledge and let the floors fall down out of there. They're just gonna fall like dominoes," said explosives expert Rod Gier.

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Gier is the guy who'll push the button. He said days of preparation have gone into the ten seconds it will take to level the place Saturday morning, part of the hundred-million dollar project to rebuild the notoriously congested interchange of I-4 and the 408.

Gier has 40 years of experience dealing with high explosives. He jokes that he's managed to keep all his fingers.

"Couple of crooked ones, but they're all right, they're still there," he said.

But, he said, security at the site is no joke. Armed guards will be on site until Saturday's blast.

"If you get caught in here, you're going to jail, or get shot, one of the two," he said.

The blast is set for about 7:00am Saturday. The Department of Transportation is asking people not to come out to watch because of safety reasons and you'll be in such a remote spot there won't be much of a view.

However, Channel 9 has been promised a great vantage point and will have live coverage of the implosion on Eyewitness News Daybreak on Saturday.