<prompt> Translate the following text to EnglishDave alisikia tumbo lake likizunguka, mpaka alipoona kwamba walikuwa wakienda kwa ndege mkubwa aliyekuwa akisafiri chini yao, akikaribia.  <response>: Dave felt his stomach twist, until he saw they were heading toward a huge bird that was cruising along under them, drawing closer. 