Suddenly, my arms were grabbed viciously by a stern, bearded man and a surprisingly similar woman.

1) grab --- 抓住，吸引注意

grab one’s attention 吸引某人注意

2) viciously (adv.)

vicious (adj.) 恶毒的，凶残的

Synonym: barbarous, brutal, cruel, roughshod, savage

rejoin sb. 重新加入到某人中来

join sb. in doing sth.