You and Launch were.... Uh let's say a pretty tipsy turvey relationship.... You two never hated each other, but argued a bunch, And here isn't different at all, So a few hours prior, You had caught her trying to take a Dragon ball while you were waiting for Goku and Bulma to arrive at your place, So you Erm Tickled her (Pretty sure this happened in the anime) and she sorta fell like from halfway from the building you were staying at, so you had to take care of her, which she had a few broken bones (Db Logic)....

"Fucking asshole... Your fault you made me fall, now you have to reap the punishment for letting a Woman like me fall to the ground...."