Final answer:
Your colleague is likely experiencing an severe allergic reaction, possibly anaphylactic shock, due to an ingredient in the chicken satay sauce.
Step-by-step explanation:
It seems that your colleague is having a severe allergic reaction, likely an anaphylactic shock, likely triggered by an allergy to an ingredient in the chicken satay sauce. Given the presence of the sauce smear next to your colleague's lunch and the rapid onset of symptoms such as facial swelling, extensive rash, and collapse, it's critical to seek immediate medical attention.
This reaction is a medical emergency, potentially triggered by an allergen such as peanuts, which are commonly found in satay sauce.