Here is a nice trap for black in the morra smith,

it is similar to the siberian trap, with a slight change in the move order to give black an extra tempo. This a solid line for black and white needs to becareful. I'm pretty sure 7. Qe2 solves most of whites problems and transposes into another line, but I haven't checked it out yet.

one expclamation mark for 10. ... Nd4 is by far enough (it is a pretty obvious move).