GA Q1

$\underset{\text{I}}{\underline{\text{While trying to collect}}}$ an envelope $\underset{\text{II}}{\underline{\text{from under the table,}}}$ $\underset{\text{III}}{\underline{\text{Mr. X fell down}}}$ and $\underset{\text{IV}}{\underline{\text{was losing consciousness.}}}$ Which one of the above underlined parts of the sentence is NOT appropriate?