It's just glue.
She clearly tripped over a jar of glue and got it all over herself (as you can see by her position, definitely just fell over)
Excuses will only get you so far in life, Clone
This 'glue' you speak of is too drippy and runny to actually look like glue unless her fall smeared it, but i can't figure out a good way to explain it dripping in areas like her foot, then her expression, either something loveual went on, or she really loves the feeling of being covered in
glue