oooohhhhh, thats a good question, I have no clue, is it a model if so do this
first search for the model with the hlmv
then make an env_model of it on the ground,
oput a cripted sequence on top of it and target the env_model to the push animation(whatever it is dontknow??)
then make a func_push over the env_model pushing up, add sound and there you have it, It would be best to trigger the events with a multi manager sorry Im in a rush If you need it clearer, Ill be on tomorrow, or another member will assist you.