#1 - Right Click on Event > Select Reverse.
#2 - Insert a velocity envelope and set any point to LESS than 0 zero, meaning any -ve value. For example
i) 100% Normal time FORWARDS
ii) 50% = half speed FORWARDS
iii) 0% = STOP!!
iv) -50% = half speed BACKWARDS - REWIND - REVERSE
v) - 100% = Normal speed BACKWARDS - REWIND - REVERSE
. .and of course ANY % in between. Now!! If you want SUPER fast then increase envelop to ABOVE 100% !!!
You can set POINTS on the Envelope to infinitely adjust ranges and sections to go fast forward<>fast backwards<>mixture of BOTH!! - Oh yes! Create a Transition and then you can start manipulating Transition Progress - MEANING, you can actually manipulate the progress of THAT transition AND reverse it halfway through too!! You could have a Slide transition slide LEFT and then halfway through slide RIGHT and then slide LEFT again. Masses to do here. MASSES!!!
Vegas TRULY excels at all this motion manipulation. I use it a lot.
IMO Vegas has mountains of functions that just get better and better the more you/I/we experiment with them.