Have you ever looked up at someone because of their unshakeable faith? Have you ever asked God for greater faith? I believe it is not a weird question at all, the disciples asked Jesus the same thing when they saw Him do all kinds of great stuff.
His answer can be found in Matthew 17:20 (TEV), I assure you that if you have faith as big as a mustard seed, you can say to this hill "Go from here to there!" and it will go. You could do anything! Notice that this translation says faith as BIG as a mustard seed. Jesus' perception of size is different than ours! He basically tells the disciples, and us today, what mustard seed faith is: something very small you can use in order to do something very big!
Faith without works is dead. Faith that exists in our head or on paper only, is no faith at all. Faith without works is like a bird in a cage: it cannot spread its wings. So, maybe you have faith for a project, for a change, for healing or deliverance... small faith, big faith, trembling faith... it doesn't really matter. We have no excuse to be passive. Go ahead, take whatever faith you have and talk it over with the Lord and ask the Holy Spirit to help you use it in a way that brings results. Together we can move mountains!