In the two most recent X-men films, Quicksilver has moved people just in time to save them from bullets/explosions etc. How is he strong enough to do this? In the new movie he moves about a dozen people outside of the building and this must require extreme stamina (and strength?).
Anecdote: I remember taking a first aid course where we practiced moving an unconscious person and it was surprisingly difficult. It really does take two people or at least a tool to move a person.