She said that this whole thing took "few seconds", but I like to imagine how she stood there for a solid 2 minutes, making faces and moving her hand back and forth, while her friend was perfectly aware of it and was teasing her on purpose or something. It reminds me of that video where they cut all the internal monologue from a cafe scene in Death Note, and it was just Light and L staring at each other in silence for several minutes, only occasionally saying a word or making a movement.