Worst-case scenario: the UEd Goblin wipes the map and burns down your house.
The JumpPad class is basically the same as the UTJumpPad. The only difference between the two is that the JumpPad class lacks bot support and can't be placed directly in the Editor. Therefor, mappers generally want to use the UTJumpPad class instead.
See Kicker for the corresponding actor in UT.