Someone at your table is on tilt
 

He's just lost a big hand and is now at about 50-60% of your (average) stack in the mid-to-high levels of $5 tournament. The tourney isn't to the point where you've started loosening up your play too much. He's gone all-in for the last 4 hands. With what range of hands would you call here?

TT+
AQo+