Right in front (of); immediately in front—indicating a position very close to something or someone.
駅の真ん前にコンビニがあるから便利だ。
There's a convenience store right in front of the station, so it's convenient.
電車が目の真ん前でドアを閉めてしまった。
The train closed its doors right in front of me.
授業中、先生の真ん前に座っていると緊張する。
If you sit right in front of the teacher during class, you get nervous.