를 잡아

grab …

→ 를
phrase Very common #1,179
grab … 를 marks the thing being grabbed; 잡아 is a casual command. The object marker can also appear as 을, depending on the noun.
KO: 손잡이를 잡아!
EN: Grab the handle!

마크를 잡아

Grab Mark.

— 마션 (2015)