If you setup an interaction for a specific frame within a slide...
you are limited to 1 action within the interaction.
Slide in View
1: Scale 1: Duration 0ms
2: Scale 1.2 Duration 500ms
Slide Out of View
1: Scale .8 Duration 500ms
2: Scale 1.2 Duration 0ms
Slide In View Step 2 and Slide Out of View Step 2
will not execute until you move your mouse off the staging area.
When you move mouse out of the window... Step 2 will execute.