The Dutchman, who set up Thomas Muller for his side's second goal against Manchester United, was left to revel in the "pure fun" of the holders' progression to the last four
The holders were stunned in the second half at the Allianz Arena as Patrice Evra's wonder strike put Manchester United in front, but Robben inspired his side to a 3-1 win, setting up Thomas Muller's goal before drilling home a third after Mario Mandzkuic had levelled on the night.
Robben crossed to Muller with his right foot for Bayern's second, and the Netherlands international told Sky after the match that he had practised the skill at the end of training earlier in the day.
"This morning after the last training we joked around on the pitch for 10 minutes and I practised crosses with my right foot. And it helped, it was a pretty good cross," he said.
"These are the evenings you sacrifice everything for, you do all the training for. These nights are pure fun."
Robben admitted he enjoyed a more productive evening at the Allianz Arena after being frustrated by United in the first leg, but warned that a potential semi-final showdown with old club Chelsea could be even more difficult for his side.
"The first half was pretty good, I had some space on the right wing. It was the same as always: we had to move the ball quickly and then get into one-on-one situations. It will not be easier if we play against Chelsea. It will be even worse."
Bayern head into Friday's draw alongside Atletico Madrid, Real Madrid and Chelsea.