All in on the flop?

[Piers]

NL holdem tournement.
5 tables left out of 13.
Blinds 50/100 just about to go up to 75/150,
Players at table 8. You are equal smallest stack at table with about 1300. Largest at table 7K, Avearge of tournement 4.5K.

Bigblind 87o
UTG+1 raise to 300.
Button and small blind call, you call. 1200 in pot.

Flop Q54 rainbow.
Checked to you?

(I checked, UTG+1 bet 1K everyone folded)