Do you think Peter can use more than one power at a time? I'm not sure he's able to because he needs to think about how he feels, if he were to switch his thoughts, he'd lose the power he was already doing. I don't think we've seen him use multiple powers at the same time yet?
We know Sylar is able to from the last episode. In his mother's house he was freezing the water and using his telekinesis to move the snow globes around.
This brings me to another question:
Who had the power to freeze water? Where did Sylar get this power from?
According to here:
http://heroeswiki.com/Sylar#Acquired_Powers It mentions:
Maybe, this was one of those extra powers?