These roller coasters give you the ride of your life... and maybe your LAST one

The Swarm, a new roller coaster set to open at an amusement park in London later this month, might have to be toned down a bit. This after crash test dummies put on the coaster had their arms and legs torn off by the horrific G-forces the Swarm generates during ride.

And then there's this lil' baby...

The Euthanasia Coaster, designed by Lithuanian engineer Julijonas Urbonas, is a concept (it only exists on paper, thank God) intended to give terminally ill people one last thrill ride.

After a precipitous drop, the coaster would take its passenger through a series of ever-tightening loops that increase the forces on the person's body, starving him/her of oxygen until death results.

Read more about the Euthanasia Coaster here.

Can you imagine one of these things at Disney World? Well, maybe under Michael Eisner...