Based on the context and the answer, generate a question. 

Context: so I was at work today and these two deaf people get in the line and I walk over and they were like ' I ' m big sit ? ' meaning something along the lines of shit I might be too fat to fit . cause yeah they were kinda heavy and I was like ' no ' in asl and they were like ' YOU KNOW SIGN ? ! ' and I started having this conversation about where I learned sign language and if I was going to go anywhere with it .

Answer:

Mouthing words



What other methods of communication could they employ to communicate with them ?