1 [sound]: {Steve revs up the motorcycle} Vrrooommm!!! {he takes off towards the launching ramp in front of the shark tank}
2 Jamie: There he goes! You know, that ramp looks a bit far away to me. Did you do the trajectory calculations, Adam?
3 Adam: Of course. To our normal high standards of accuracy!
4 Jamie: Uh oh...
4 Terry: Steve! Stop!!
4 [sound]: Vroooom!! {Steve flies up the launch ramp...}

The real life MythBusters have had their experiments messed up a few times by miscalculations. But they're usually pretty good with safety issues. Usually.

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2015-04-17 Rerun commentary: Looking back at the previous strip in this story, you can see that the workers setting up the launch ramp have actually moved it further away from the shark tank.

On the topic of the real life MythBusters, as far as I recall, all of the most serious accidents and injuries that I can recall happening on the show were basically caused by Tory.