In the opening sequence, SSS and SSJ escape via jet packs, however prior to the opening of the vault, they are not wearing any.
^-- The jet packs could've been hidden. In all of the 007 flicks, they always have hidden parachutes for aerial stunts.
^-- The jetpacks are bulky, metal, and appear seemingly without disturbing the Seniors' relatively close-fitting clothing. Were this not an animated series, the "hidden" theory would be entirely implausible... unless, perhaps, the jetpacks were hidden off their persons. The safecracker robot is large enough to conceal the packs, but its tentacles would have to work almost impossibly fast to distribute them during the quick cut to SSS's remote control.