If he hadn't been welding a weapon, Nina would have lunged at him for that. Tackle-tickles would clearly have been the best way to deal with that, right?

As it was...

"Oh my goooooooooossssssssshhhhhhhhhhhhhhh, why are you like this???????????????????" she said, eager and jittery and he was doing it on purpose, the jerk! Jerk! "Promptooooooooooooo!"